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MINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic. GCE O LEVEL PHYSICS QUIZ September 13, 2019. February 4, 2014. by Mini Physics. The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics. If you have questions regarding ‘O’ Level Physics, you can ask a question inthe comments below.
KIRCHHOFF'S SECOND LAW Kirchhoff’s second law or voltage law is a consequence of the law of conservation of energy. If a charge moves around a closed loop in a circuit, it must gain as much energy as it loses. Hence, the gain in electrical energy by the charge = corresponding losses in energy through resistances. Note: You might understand it better after going FAILURE OF CLASSICAL WAVE THEORY Classical wave theory cannot explain the first 3 observations of photoelectric effect. 1. Existence of the threshold frequency. Since energy of the wave is dependent on the square of its amplitude, the classical wave theory predicts that if sufficiently intense light is used, the electrons would absorb enough energy to escape. 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
PRACTICE MCQS FOR MASS, WEIGHT AND DENSITY, WORK, ENERGY Practice MCQs For Mass, Weight and Density, Work, Energy and Power. This quiz contains practice questions for GCE ‘O’ level topics: Mass, Weight and Density, Work, Energy and Power . There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feelfree to
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper HOW TO READ A MICROMETER SCREW GAUGE The above image shows a typical micrometer screw gauge and how to read it. Steps: To obtain the first part of the measurement: Look at the image above, you will see a number 5 to the immediate left of the thimble. This means 5.0 mm. Notice that there is an extra line below the datum line, this represents an additional 0.5 mm. CRACKING GLASS WITH HOT WATER? Here are some ways to do that: Pour the hot water (very) slowly into the glass. Put a metal spoon in the glass to conduct away some of the heat. The temperature of the water will drop and the inner glass layer will face a slightly cooler body of water. Warm up the glass gradually by filling it with 50% room temperature water and 50% hot water.MINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic. GCE O LEVEL PHYSICS QUIZ September 13, 2019. February 4, 2014. by Mini Physics. The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics. If you have questions regarding ‘O’ Level Physics, you can ask a question inthe comments below.
KIRCHHOFF'S SECOND LAW Kirchhoff’s second law or voltage law is a consequence of the law of conservation of energy. If a charge moves around a closed loop in a circuit, it must gain as much energy as it loses. Hence, the gain in electrical energy by the charge = corresponding losses in energy through resistances. Note: You might understand it better after going FAILURE OF CLASSICAL WAVE THEORY Classical wave theory cannot explain the first 3 observations of photoelectric effect. 1. Existence of the threshold frequency. Since energy of the wave is dependent on the square of its amplitude, the classical wave theory predicts that if sufficiently intense light is used, the electrons would absorb enough energy to escape. 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
PRACTICE MCQS FOR MASS, WEIGHT AND DENSITY, WORK, ENERGY Practice MCQs For Mass, Weight and Density, Work, Energy and Power. This quiz contains practice questions for GCE ‘O’ level topics: Mass, Weight and Density, Work, Energy and Power . There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feelfree to
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper HOW TO READ A MICROMETER SCREW GAUGE The above image shows a typical micrometer screw gauge and how to read it. Steps: To obtain the first part of the measurement: Look at the image above, you will see a number 5 to the immediate left of the thimble. This means 5.0 mm. Notice that there is an extra line below the datum line, this represents an additional 0.5 mm. CRACKING GLASS WITH HOT WATER? Here are some ways to do that: Pour the hot water (very) slowly into the glass. Put a metal spoon in the glass to conduct away some of the heat. The temperature of the water will drop and the inner glass layer will face a slightly cooler body of water. Warm up the glass gradually by filling it with 50% room temperature water and 50% hot water. GCE O LEVEL PHYSICS QUIZ September 13, 2019. February 4, 2014. by Mini Physics. The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics. If you have questions regarding ‘O’ Level Physics, you can ask a question inthe comments below.
PHASE DIFFERENCE
Phase difference : 0 radians (or multiples of 2π 2 π) Distance between 2 particles (path difference) is an integer multiple of the wavelength. P1 and P3 are π π radian out of phase. They are 1 2 1 2 a cycle apart from each other at any point in time. They have velocities in the opposite direction. READING KINEMATICS GRAPHS Distance-Time Graphs. For a distance-time graph, the distance never decreases. When the object is stationary, the distance-time graph will be horizontal. The gradient of a distance-time graph is the instantaneous speed of the object. For straight line with positive gradient, it means that the object is travelling at uniform speed. GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick. KIRCHHOFF'S SECOND LAW Kirchhoff’s second law or voltage law is a consequence of the law of conservation of energy. If a charge moves around a closed loop in a circuit, it must gain as much energy as it loses. Hence, the gain in electrical energy by the charge = corresponding losses in energy through resistances. Note: You might understand it better after going UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper EFFECTIVE RESISTANCE OF RESISTORS Resistors In Series. If individual resistors are connected from end to end, the resistors are said to be connected in series. The effective resistance, R, of three resistors of resistances R 1, R 2; and R 3 connected in series (shown in the figure) is given by: R = R1 + R2 +R3 R = R 1 + R 2 + R 3. In general, if there are n resistors in series ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
MINI PHYSICS
These worked examples will help to solidify your understanding towards the concept of conservation of energy and energy conversion. Worked Example 1: Speeding Projectile A projectile of mass 0.02 kg O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) A formulalist for reference
GCE O LEVEL PHYSICS QUIZ The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics. KIRCHHOFF'S SECOND LAW Kirchhoff’s second law states that the net electromotive force around a closed circuit loop is equal to the sum of potential drops around the loop. OR The algebraic sum of the changes in potential encountered in a complete traversal of a closed circuit loop must bezero.
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper HOW TO READ A MICROMETER SCREW GAUGE A quick guide on how to read a micrometer screw gauge.Similar to the way a vernier caliper is read, a micrometer reading contains two parts:. the first part is contributed by the main scale on the sleeve; the second part is contributed by the rotating vernier scale on thethimble
PRACTICE MCQS FOR MASS, WEIGHT AND DENSITY, WORK, ENERGY This quiz contains practice questions for GCE ‘O’ level topics: Mass, Weight and Density, Work, Energy and Power.There are explanations for some of the questions after you submit the quiz. FAILURE OF CLASSICAL WAVE THEORY According to classical wave theory, Intensity of a wave is the energy incident per unit area per unit time. Energy carried by an electromagnetic wave is 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES – NiMH has high self-discharge rate and loses about 20 percent of its capacity within the first 24 hours, and 10 percent per month thereafter. (Some brands claim that their batteries can slow down this self-discharge rate) CRACKING GLASS WITH HOT WATER? The heated vapour from the hot tea has transferred heat energy to the side of the mirror closer to the hot tea. As there is a temperature difference between the two sides of the mirror, the expansion will be different on both side.MINI PHYSICS
These worked examples will help to solidify your understanding towards the concept of conservation of energy and energy conversion. Worked Example 1: Speeding Projectile A projectile of mass 0.02 kg O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) A formulalist for reference
GCE O LEVEL PHYSICS QUIZ The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics. KIRCHHOFF'S SECOND LAW Kirchhoff’s second law states that the net electromotive force around a closed circuit loop is equal to the sum of potential drops around the loop. OR The algebraic sum of the changes in potential encountered in a complete traversal of a closed circuit loop must bezero.
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper HOW TO READ A MICROMETER SCREW GAUGE A quick guide on how to read a micrometer screw gauge.Similar to the way a vernier caliper is read, a micrometer reading contains two parts:. the first part is contributed by the main scale on the sleeve; the second part is contributed by the rotating vernier scale on thethimble
PRACTICE MCQS FOR MASS, WEIGHT AND DENSITY, WORK, ENERGY This quiz contains practice questions for GCE ‘O’ level topics: Mass, Weight and Density, Work, Energy and Power.There are explanations for some of the questions after you submit the quiz. FAILURE OF CLASSICAL WAVE THEORY According to classical wave theory, Intensity of a wave is the energy incident per unit area per unit time. Energy carried by an electromagnetic wave is 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES – NiMH has high self-discharge rate and loses about 20 percent of its capacity within the first 24 hours, and 10 percent per month thereafter. (Some brands claim that their batteries can slow down this self-discharge rate) CRACKING GLASS WITH HOT WATER? The heated vapour from the hot tea has transferred heat energy to the side of the mirror closer to the hot tea. As there is a temperature difference between the two sides of the mirror, the expansion will be different on both side. GCE O LEVEL PHYSICS QUIZ The (FREE!) quizzes are separated into their respective topics and contain multiple choice questions (MCQs). They are meant to serve as extra practice questions for GCE ‘O’ Level Physics.PHASE DIFFERENCE
Phase Difference ($\\phi$) between two particles or two waves tells us how much a particle (or wave) is in front or behind another particle (or wave). Value ranges from 0 to $2 \\pi$ radians Referri READING KINEMATICS GRAPHS For a distance-time graph, the distance never decreases.; When the object is stationary, the distance-time graph will be horizontal. The gradient of a distance-time graph is the instantaneous speed of the object.; For straight line with positive gradient, it GAMMA RAYS | MINI PHYSICS Gamma Rays They are electromagnetic waves of wavelengths shorter than those of X-rays Electrically neutral, are not deflected by electric and magnetic fields. Among the KIRCHHOFF'S SECOND LAW Kirchhoff’s second law states that the net electromotive force around a closed circuit loop is equal to the sum of potential drops around the loop. OR The algebraic sum of the changes in potential encountered in a complete traversal of a closed circuit loop must bezero.
UY1: SPHERE ON AN INCLINE The figure above shows a sphere rolling down an incline. We will analyze this rolling motion. Important facts about accelerated rolling motion: Accelerated rolling motion is possible only if a fric HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper EFFECTIVE RESISTANCE OF RESISTORS If individual resistors are connected from end to end, the resistors are said to be connected in series. The effective resistance, R, of three resistors of resistances R 1, R 2; and R 3 connected in series (shown in the figure) is given by: $ R = R_{1} + R_{2} + R_{3}$ ENERGY STORED IN SPHERICAL CAPACITOR Click to share on Twitter (Opens in new window) Click to share on Facebook (Opens in new window) Click to share on Reddit (Opens in newwindow) Click to
ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density $\sigma$ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk.MINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there is GROUND FAULT INTERRUPTERS Ground fault interrupter is an interesting safety device that protects people against electric shock when they touch appliances and power tools. Its operation makes use of Faraday’s law. When the return current is not the same as the supply current, a fault occurs at the appliance or power tool. Some current is allowed to flow out of thedevice.
ROLLING UPHILL ILLUSION This creates an optical illusion making a slight downhill look like an uphill slope. Objects may appear to roll uphill. Sometimes rivers even seem to flow against gravity. Spots where the illusion is especially powerful often become tourist attractions. Tour guides may like to claim that the effect is a mystery or that it is due to magnetic or 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
MINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there is GROUND FAULT INTERRUPTERS Ground fault interrupter is an interesting safety device that protects people against electric shock when they touch appliances and power tools. Its operation makes use of Faraday’s law. When the return current is not the same as the supply current, a fault occurs at the appliance or power tool. Some current is allowed to flow out of thedevice.
ROLLING UPHILL ILLUSION This creates an optical illusion making a slight downhill look like an uphill slope. Objects may appear to roll uphill. Sometimes rivers even seem to flow against gravity. Spots where the illusion is especially powerful often become tourist attractions. Tour guides may like to claim that the effect is a mystery or that it is due to magnetic or 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic. GROUND FAULT INTERRUPTERS Ground fault interrupter is an interesting safety device that protects people against electric shock when they touch appliances and power tools. Its operation makes use of Faraday’s law. When the return current is not the same as the supply current, a fault occurs at the appliance or power tool. Some current is allowed to flow out of thedevice.
FERMI FUNCTION
March 29, 2015. January 2, 2011. by Mini Physics. The probability that an electron energy state will be occupied at a particular temperature T is given by the Fermi function f (E). f (E) = 1 eE–EF kT +1 f ( E) = 1 e E – E F k T + 1. The basic nature of this function dictates that at ordinary temperatures, nmost of the levels up to the Fermi DEFINING A TEMPERATURE SCALE The figure above shows the comparison between the Celcius scale (centigrade scale) and the Kelvin scale. The unit for the Kelvin Scale is the Kelvin (K), which is the SI unit for temperature. 1 K is defined as the $\frac{1}{273.16}$ of the temperature of the triple point of water. The triple point of water is the temperature at which saturated water vapour, pure water and ice all coexist in ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. PRACTICE MCQS FOR THERMAL PHYSICS A student is given a thermometer that reads 1∘C 1 ∘ C in pure melting ice and 101∘C 101 ∘ C in pure boiling water. She uses it to measure the temperature of some water before and after it is heated. The increase in temperature of the water calculated from herresults is.
ROLLING UPHILL ILLUSION This creates an optical illusion making a slight downhill look like an uphill slope. Objects may appear to roll uphill. Sometimes rivers even seem to flow against gravity. Spots where the illusion is especially powerful often become tourist attractions. Tour guides may like to claim that the effect is a mystery or that it is due to magnetic or QUESTIONS FOR THERMAL PHYSICS (JC) SET 2 Questions for Thermal Physics (JC) Set 2. a) (i) The First Law of Thermodynamics is in agreement with the Principle of Conservation of Energy. Give a word equation stating the First Law of Thermodynamics. (ii) A student suggests that when heat is supplied to a HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier Caliper ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
MINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there isMINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there is O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic.PHASE DIFFERENCE
Phase difference : 0 radians (or multiples of 2π 2 π) Distance between 2 particles (path difference) is an integer multiple of the wavelength. P1 and P3 are π π radian out of phase. They are 1 2 1 2 a cycle apart from each other at any point in time. They have velocities in the opposite direction.FORCES AND DYNAMICS
Forces And Dynamics. January 28, 2020. November 14, 2010. by Mini Physics. This topic covers “Forces and Dynamics” of A Level Physics. (Equivalent to Advanced Placement) If this is too advanced for you, you can try the more basic version here.PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) GROUND FAULT INTERRUPTERS Ground fault interrupter is an interesting safety device that protects people against electric shock when they touch appliances and power tools. Its operation makes use of Faraday’s law. When the return current is not the same as the supply current, a fault occurs at the appliance or power tool. Some current is allowed to flow out of thedevice.
ROLLING UPHILL ILLUSION This creates an optical illusion making a slight downhill look like an uphill slope. Objects may appear to roll uphill. Sometimes rivers even seem to flow against gravity. Spots where the illusion is especially powerful often become tourist attractions. Tour guides may like to claim that the effect is a mystery or that it is due to magnetic or EFFECTIVE RESISTANCE OF RESISTORS Resistors In Series. If individual resistors are connected from end to end, the resistors are said to be connected in series. The effective resistance, R, of three resistors of resistances R 1, R 2; and R 3 connected in series (shown in the figure) is given by: R = R1 + R2 +R3 R = R 1 + R 2 + R 3. In general, if there are n resistors in series ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
ELECTRIC POTENTIAL OF A RING OF CHARGE We can check the answer above as we have derived the electric field of a ring of charge. We recall that Ex =– ∂V ∂x E x = – ∂ V ∂ x. Ex =– ∂V ∂x = xQ 4πϵ0(a2 + x2)3 2 E x = – ∂ V ∂ x = x Q 4 π ϵ 0 ( a 2 + x 2) 3 2. The expression for electric field of aring of charge is
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier CaliperMINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there isMINI PHYSICS
January 9, 2020. January 28, 2020. | A Level, Kinematics (A Level), O Level, Speed, Velocity & Acceleration. Important Kinematics Equations! (Memorize them!) These equations are known as equations of motion. They are only valid if the acceleration is CONSTANT (UNIFORM acceleration). v = u+ at (1) (1) v = u + a t . GAMMA RAYS | MINI PHYSICS Gamma Rays. They are electromagnetic waves of wavelengths shorter than those of X-rays. Electrically neutral, are not deflected by electric and magnetic fields. Among the three types of radiation, gamma rays have the strongest penetration power. Gamma rays are stopped by lead of a few centimetres thick.ELECTROSTATIC
Electrons can be removed from atoms or added to atoms and the material is left with a net charge, and electrical effects result. The study of these net stationary charges and their effects on each other constitutes the subject of static electricity or electrostatics. Atoms with net charges are called ions. Administrator of Mini Physics.HOOKE'S LAW
Applies to springs, elastic springs and metals in form of wires. Springs connected in parallel. keff = k1 + k2 + k e f f = k 1 + k 2 + . Springs connected in series. 1 keff = 1 k1 + 1 k2 + 1 k e f f = 1 k 1 + 1 k 2 + . Same load, less extension compared to series. Elastic potential energy stored in wire or spring (Amount of work UY1: SPHERE ON AN INCLINE Method 1: Using Energy Conservation Equation. Using the vCM v CM found above: We know that the moment of inertia for a solid sphere is I CM = 2 5M R2 I CM = 2 5 M R 2. Hence, vCM = √10 7 gh v CM = 10 7 g h. For 1D motion with constant acceleration, we have: v2 CM = 2aCMx v CM 2 =2 a CM x.
PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) 7 TIPS TO TAKE BETTER CARE OF YOUR RECHARGEABLE BATTERIES 6) Do not charge batteries of different charge level in the same charger. Reason: More charge will flow into the weak battery, causing the weak batteries to become hot. This may cause the battery to explode if the pressure inside the battery reaches critical levels. What should you do: Only place NiMH batteries of approximately thesame charge
ELECTRIC FIELD OF UNIFORMLY CHARGED DISK Find the electric field caused by a disk of radius R with a uniform positive surface charge density σ σ and total charge Q, at a point P. Point P lies a distance x away from the centre of the disk, on the axis through the centre of the disk. σ = Q πR2 σ = Q π R 2. To find dQ, we will need dA d A. Note that dA = 2πrdr d A = 2 π r d r. ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
UY1: CAPACITANCE OF A CYLINDRICAL CAPACITOR UY1: Capacitance Of A Cylindrical Capacitor. A long cylindrical conductor has a radius ra r a and a linear charge density +λ + λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb r b and linear charge density −λ − λ. Calculate the capacitance per unit length for this capacitor, assuming that there is O LEVEL PHYSICS FORMULA LIST This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic.PHASE DIFFERENCE
Phase difference : 0 radians (or multiples of 2π 2 π) Distance between 2 particles (path difference) is an integer multiple of the wavelength. P1 and P3 are π π radian out of phase. They are 1 2 1 2 a cycle apart from each other at any point in time. They have velocities in the opposite direction.FORCES AND DYNAMICS
Forces And Dynamics. January 28, 2020. November 14, 2010. by Mini Physics. This topic covers “Forces and Dynamics” of A Level Physics. (Equivalent to Advanced Placement) If this is too advanced for you, you can try the more basic version here.PRESSURE (O LEVEL)
Pressure (O Level) January 19, 2020. February 16, 2012. by Mini Physics. This topic covers “Pressure” of O Level Physics. (Equivalent to American high school diploma) GROUND FAULT INTERRUPTERS Ground fault interrupter is an interesting safety device that protects people against electric shock when they touch appliances and power tools. Its operation makes use of Faraday’s law. When the return current is not the same as the supply current, a fault occurs at the appliance or power tool. Some current is allowed to flow out of thedevice.
ROLLING UPHILL ILLUSION This creates an optical illusion making a slight downhill look like an uphill slope. Objects may appear to roll uphill. Sometimes rivers even seem to flow against gravity. Spots where the illusion is especially powerful often become tourist attractions. Tour guides may like to claim that the effect is a mystery or that it is due to magnetic or EFFECTIVE RESISTANCE OF RESISTORS Resistors In Series. If individual resistors are connected from end to end, the resistors are said to be connected in series. The effective resistance, R, of three resistors of resistances R 1, R 2; and R 3 connected in series (shown in the figure) is given by: R = R1 + R2 +R3 R = R 1 + R 2 + R 3. In general, if there are n resistors in series ENERGY STORED IN SPHERICAL CAPACITOR Find the electric potential energy stored in the capacitor. There are two ways to solve the problem – by using the capacitance, by integrating the electric field density. Using the capacitance, (The capacitance of a spherical capacitor is derived in Capacitance Of Spherical Capacitor .) C = 4πϵ0 rarb rb − ra C = 4 π ϵ 0 r a r br b − r a.
ELECTRIC POTENTIAL OF A RING OF CHARGE We can check the answer above as we have derived the electric field of a ring of charge. We recall that Ex =– ∂V ∂x E x = – ∂ V ∂ x. Ex =– ∂V ∂x = xQ 4πϵ0(a2 + x2)3 2 E x = – ∂ V ∂ x = x Q 4 π ϵ 0 ( a 2 + x 2) 3 2. The expression for electric field of aring of charge is
HOW TO READ A VERNIER CALIPER A quick guide on how to read a vernier caliper.A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).. Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches. Measurement Reading Technique For Vernier CaliperMINI PHYSICS
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