AQA A LEVEL PHYSICS QUESTIONS
AND ANSWERS UPDATED 2025
Electromotive force (emf) - correct answers-Amount of electrical energy produced by a battery/source
per 1C of charge
Power - correct answers-Rate of transfer of electrical energy to a component per second
Resistance - correct answers-Potential difference divided by the current, if the electrical energy used
when a current of 1 Amp moves through a component
Electrical current - correct answers-1A of current is defined as 1C of charge passing a point per second
Potential difference - correct answers-Amount of electrical energy converted or transferred per 1 C of
charge between 2 points
Ohm's law - correct answers-The current passing through a conductor is directly proportional to the
voltage as long as the physical conditions don't change
Resistivity - correct answers-The resistance of a 1m^2 cross section conductor with a length of 1m
Critical temperature - correct answers-The temperature that below which a superconductor has no
resistance and very large currents can pass through with very small voltage/very small energy losses
Internal resistance - correct answers-An electrical source or cell's opposition to the flow of charge
through it, defined as the loss of pd per 1A current when a current passes through the source/cell
Isotopes - correct answers-Nuclei with the name number of protons but different number of neutrons
Pair production - correct answers-When a particle and its corresponding anti-particle are produced from
a photon with energy greater than the total rest energy of the 2 particles
Annihilation - correct answers-When a particle and its corresponding anti-particle collide they annihilate
converted their kinetic energy and rest energies into 2 high energy photons(E=hf)
Moment - correct answers-Force multiplied by perpendicular distance between force and the pivot
Principle of moments - correct answers-For an object to be in equilibrium the sum of the anticlockwise
moments is equal to the sum of the clockwise moments (no turning moment)
An object is in equilibrium if - correct answers--Sum of anticlockwise moments=sum of clockwise
moments
-All vertical forces cancel and all horizontal forces cancel
A couple - correct answers-A pair of opposite and equal forces separated by distance,d, acting about
point p, the turning effect at point p is equal to one of the forces multiplied by the perpendicular
distance between the forces.
Centre of mass - correct answers-Where all of an objects mass appears to act about
A Newton - correct answers-Force required to accelerate 1kg by 1ms^-2
AND ANSWERS UPDATED 2025
Electromotive force (emf) - correct answers-Amount of electrical energy produced by a battery/source
per 1C of charge
Power - correct answers-Rate of transfer of electrical energy to a component per second
Resistance - correct answers-Potential difference divided by the current, if the electrical energy used
when a current of 1 Amp moves through a component
Electrical current - correct answers-1A of current is defined as 1C of charge passing a point per second
Potential difference - correct answers-Amount of electrical energy converted or transferred per 1 C of
charge between 2 points
Ohm's law - correct answers-The current passing through a conductor is directly proportional to the
voltage as long as the physical conditions don't change
Resistivity - correct answers-The resistance of a 1m^2 cross section conductor with a length of 1m
Critical temperature - correct answers-The temperature that below which a superconductor has no
resistance and very large currents can pass through with very small voltage/very small energy losses
Internal resistance - correct answers-An electrical source or cell's opposition to the flow of charge
through it, defined as the loss of pd per 1A current when a current passes through the source/cell
Isotopes - correct answers-Nuclei with the name number of protons but different number of neutrons
Pair production - correct answers-When a particle and its corresponding anti-particle are produced from
a photon with energy greater than the total rest energy of the 2 particles
Annihilation - correct answers-When a particle and its corresponding anti-particle collide they annihilate
converted their kinetic energy and rest energies into 2 high energy photons(E=hf)
Moment - correct answers-Force multiplied by perpendicular distance between force and the pivot
Principle of moments - correct answers-For an object to be in equilibrium the sum of the anticlockwise
moments is equal to the sum of the clockwise moments (no turning moment)
An object is in equilibrium if - correct answers--Sum of anticlockwise moments=sum of clockwise
moments
-All vertical forces cancel and all horizontal forces cancel
A couple - correct answers-A pair of opposite and equal forces separated by distance,d, acting about
point p, the turning effect at point p is equal to one of the forces multiplied by the perpendicular
distance between the forces.
Centre of mass - correct answers-Where all of an objects mass appears to act about
A Newton - correct answers-Force required to accelerate 1kg by 1ms^-2
