A-level physics paper 1 2024
Ohm's law: (2 marks) - ans- current through a conductor between two points is directly
proportional to the p.d. across those points
- provided the temperature remains constant
What is meant by specific latent heat of fusion? (2 marks) - ansthe energy transferred to
1 kg of substance to change its state from solid to liquid
- without a change of temperature
What is not conserved in an inelastic colission? (1 mark) - ansKE
Compare the mean KE of argon atoms and helium atoms in a gas mixture? - ansboth
have same mean KE
What is boyle's law? - anspV = k when T is constant
What is pressure law? - ansp = kT when V is constant
What is Charles' Law? - ansV = kT when p is constant
What are coherent waves? - ans- constant phase difference
- same frequency and wavelength
What to say for diffraction questions: - ansfor single slit:
- central maximum with lower intensity maxima either side
- central maximum is 2 times wider than other maxima
if light was a particle what would diffraction look like - ansspot of light
effect of using higher wavelength light in diffraction grating - ans- wider central maxima
- maxima further apart
wavelength of red light and blue light - ansred: 650-700 nm
blue: 450-495 nm
how to find frequency of red light and blue light - ansuse c = f lambda
, how is the particle theory of light disproved by photoelectric emission? - ansif light was a
wave
- every electron would gains sufficient energy from the waves in time
- no matter what the frequency of light is
- discrete
Draw the feynman diagram for the strong interaction - ans1
Draw the feynman diagram for the electromagnetic interaciton - ans2
Draw the feynman diagram for the beat minus decay - ans3
draw the feynman diagram for the beta plus decay - ans4
draw the feynman diagram for electron capture - ans5
draw the feynman diagram for neutrino neutron collision - ans6
draw the feynman diagram for anineutrino-proton collision - ans7
draw the Feynman diagram for electron-proton collision - ans8
How do superconductors work? - ansWhen cooled below a critical temperature their
resistivity drops to 0 so they have very low resistance
How do thermistors work? - ansAs the temperature increases, the resistance of the
thermistor decreases
How are superconductors used? - ans- high power electromagnets
- power cables
- Magnetic Resonance Imaging scanners (MRI)
What is the potential divider equation? - ansV1 = V * (R1/(R1+R2))
where V is the terminal pd
and there are two resistors 1 and 2, the order of which does not matter
What happens to light when it enters material with higher refractive index? - ansbends
towards the normal
Ohm's law: (2 marks) - ans- current through a conductor between two points is directly
proportional to the p.d. across those points
- provided the temperature remains constant
What is meant by specific latent heat of fusion? (2 marks) - ansthe energy transferred to
1 kg of substance to change its state from solid to liquid
- without a change of temperature
What is not conserved in an inelastic colission? (1 mark) - ansKE
Compare the mean KE of argon atoms and helium atoms in a gas mixture? - ansboth
have same mean KE
What is boyle's law? - anspV = k when T is constant
What is pressure law? - ansp = kT when V is constant
What is Charles' Law? - ansV = kT when p is constant
What are coherent waves? - ans- constant phase difference
- same frequency and wavelength
What to say for diffraction questions: - ansfor single slit:
- central maximum with lower intensity maxima either side
- central maximum is 2 times wider than other maxima
if light was a particle what would diffraction look like - ansspot of light
effect of using higher wavelength light in diffraction grating - ans- wider central maxima
- maxima further apart
wavelength of red light and blue light - ansred: 650-700 nm
blue: 450-495 nm
how to find frequency of red light and blue light - ansuse c = f lambda
, how is the particle theory of light disproved by photoelectric emission? - ansif light was a
wave
- every electron would gains sufficient energy from the waves in time
- no matter what the frequency of light is
- discrete
Draw the feynman diagram for the strong interaction - ans1
Draw the feynman diagram for the electromagnetic interaciton - ans2
Draw the feynman diagram for the beat minus decay - ans3
draw the feynman diagram for the beta plus decay - ans4
draw the feynman diagram for electron capture - ans5
draw the feynman diagram for neutrino neutron collision - ans6
draw the feynman diagram for anineutrino-proton collision - ans7
draw the Feynman diagram for electron-proton collision - ans8
How do superconductors work? - ansWhen cooled below a critical temperature their
resistivity drops to 0 so they have very low resistance
How do thermistors work? - ansAs the temperature increases, the resistance of the
thermistor decreases
How are superconductors used? - ans- high power electromagnets
- power cables
- Magnetic Resonance Imaging scanners (MRI)
What is the potential divider equation? - ansV1 = V * (R1/(R1+R2))
where V is the terminal pd
and there are two resistors 1 and 2, the order of which does not matter
What happens to light when it enters material with higher refractive index? - ansbends
towards the normal
