A Level Physics Paper 3 Edexcel Exam with Questions and Answers (2025-2026) –
100% Solved
Decribe how to determine the wavlength of light using diffration grating - ✔✔✔-
Describe how to analyse the PD across a charging and discharging capacitor - ✔✔✔-For
Charging
1. Set up a circuit with a DC power supply, high resistance resistor
2. Close switch to charging position and start the timer
3. Record PD and current every 10s
4. Repeat process 3 times and calulate mean V and I
5. Plot graph of current against time and PD against time
For discharging
same method jsut move switch to discharging postion
Describe how to analyse the results from determing the emf and internal resitance of an
electrical cell - ✔✔✔-Plot graph of Vt against I, draw line of best fit with eqaution
Vt = ℰ - Ir
graident is negative internal resistance -r
Y intercept is ℰ
,A Level Physics Paper 3 Edexcel Exam with Questions and Answers (2025-2026) –
100% Solved
Describe how to determine the specific latent heat of a solid - ✔✔✔-
Describe how to determine the value of an unkown mass using the resonant frequencies of the
oscillation of known masses - ✔✔✔-
Describe how to determine the wavelength of light using double-slit experiment - ✔✔✔-1.
Shine mono chromatic light (same wavelength) through 2 slits and to produce 2 coherent wave
sources
2. The coherent waves will interfere as they overlap
Points of contrctive interfernce form bright fringes on the screen
Points of destructive interference form dark fringes on the screen
3. Measure the slit to screen distance, D in metres
4. Measure the slit distance, a in metres
5. Measure the fringe seperation, x
6. Calculate the wavelength as followed
wavelength = ax/ D
Describe how to investigate change in momentum - ✔✔✔-
, A Level Physics Paper 3 Edexcel Exam with Questions and Answers (2025-2026) –
100% Solved
Describe how to investigate the adsoprtion of Gamma radiation by lead - ✔✔✔-
Describe how to investigate the relationship between pressure and volume of a gas - ✔✔✔-
Describe how to use ICT to analyse collisions between small spheres - ✔✔✔-1. Record the
masses, m of two spheres using a mass balance then place them on a level table top
2. Postion two metre rulers perependicular to each other using a set square
3. Position a video camera above the table top, and start camera recording
4. Roll one sphere towards stationary sphere and allow them to collide and roll
5. Stop recording when both spheres come to rest
6. Use video analysis software to go through each frame of the video, use the rulers to calculate
the distance travelled and calculate the time between each frame
7. Use compents to find intital and final velocity of the spheres
8. Use velocities to show momentum is conserved
Describe the experiment to determine the speed of sound in air - ✔✔✔-1. Set time base on
oscilloscope to 100ms/cm, and y-gain 0.1 volts/cm
2. Connect microphone to input on oscilloscope, activate second beam mode
100% Solved
Decribe how to determine the wavlength of light using diffration grating - ✔✔✔-
Describe how to analyse the PD across a charging and discharging capacitor - ✔✔✔-For
Charging
1. Set up a circuit with a DC power supply, high resistance resistor
2. Close switch to charging position and start the timer
3. Record PD and current every 10s
4. Repeat process 3 times and calulate mean V and I
5. Plot graph of current against time and PD against time
For discharging
same method jsut move switch to discharging postion
Describe how to analyse the results from determing the emf and internal resitance of an
electrical cell - ✔✔✔-Plot graph of Vt against I, draw line of best fit with eqaution
Vt = ℰ - Ir
graident is negative internal resistance -r
Y intercept is ℰ
,A Level Physics Paper 3 Edexcel Exam with Questions and Answers (2025-2026) –
100% Solved
Describe how to determine the specific latent heat of a solid - ✔✔✔-
Describe how to determine the value of an unkown mass using the resonant frequencies of the
oscillation of known masses - ✔✔✔-
Describe how to determine the wavelength of light using double-slit experiment - ✔✔✔-1.
Shine mono chromatic light (same wavelength) through 2 slits and to produce 2 coherent wave
sources
2. The coherent waves will interfere as they overlap
Points of contrctive interfernce form bright fringes on the screen
Points of destructive interference form dark fringes on the screen
3. Measure the slit to screen distance, D in metres
4. Measure the slit distance, a in metres
5. Measure the fringe seperation, x
6. Calculate the wavelength as followed
wavelength = ax/ D
Describe how to investigate change in momentum - ✔✔✔-
, A Level Physics Paper 3 Edexcel Exam with Questions and Answers (2025-2026) –
100% Solved
Describe how to investigate the adsoprtion of Gamma radiation by lead - ✔✔✔-
Describe how to investigate the relationship between pressure and volume of a gas - ✔✔✔-
Describe how to use ICT to analyse collisions between small spheres - ✔✔✔-1. Record the
masses, m of two spheres using a mass balance then place them on a level table top
2. Postion two metre rulers perependicular to each other using a set square
3. Position a video camera above the table top, and start camera recording
4. Roll one sphere towards stationary sphere and allow them to collide and roll
5. Stop recording when both spheres come to rest
6. Use video analysis software to go through each frame of the video, use the rulers to calculate
the distance travelled and calculate the time between each frame
7. Use compents to find intital and final velocity of the spheres
8. Use velocities to show momentum is conserved
Describe the experiment to determine the speed of sound in air - ✔✔✔-1. Set time base on
oscilloscope to 100ms/cm, and y-gain 0.1 volts/cm
2. Connect microphone to input on oscilloscope, activate second beam mode
