1
AQA A LEVEL PHYSICS PAPER 1 QUESTIONS
WITH 100% CORRECT ANSWERS SOLUTIONS
2025
What is meant by work function (2) - correct-answer -Minimum energy required
by an electron to escape from (1) a metal surface (1)
What is meant by ionisation energy? (2) - correct-answer -Minimum energy
required to remove an electron from an atom (1) from the ground state (1)
Why do emitted electrons have a kinetic energy that varies up to a maximum
value? (4) - correct-answer -Energy of a photon is fixed/constant (1)
Energy is required for electrons to overcome work function ø (1)
Electrons deeper into/below the surface of the metal require more energy to
overcome work function and therefore have less KE(1)
Maximum KE = Energy of photon - work function ø (1)
, 2
Explain how (bright ring) diagram is evidence of the wave-particle duality of
electrons? - correct-answer -Diffraction pattern maxima/minima (bright and dark
areas) (1)
Diffraction is a property of waves- proves wave-behaviour of electrons (1)
What is meant by the ground state? - correct-answer -The lowest energy state of
an atom
conditions for equilibrium - correct-answer -resultant force is 0 (1) resultant
torque is 0 (1)
difference between scalar and vector - correct-answer -vector has magnitude and
direction scalar only has magnitude
definition of elastic limit - correct-answer -maximum force/load which can be
applied to the object without it being permanently deformed
define hookes law - correct-answer -Extension is proportional to the applied force
up to limit of proportionality (1)
AQA A LEVEL PHYSICS PAPER 1 QUESTIONS
WITH 100% CORRECT ANSWERS SOLUTIONS
2025
What is meant by work function (2) - correct-answer -Minimum energy required
by an electron to escape from (1) a metal surface (1)
What is meant by ionisation energy? (2) - correct-answer -Minimum energy
required to remove an electron from an atom (1) from the ground state (1)
Why do emitted electrons have a kinetic energy that varies up to a maximum
value? (4) - correct-answer -Energy of a photon is fixed/constant (1)
Energy is required for electrons to overcome work function ø (1)
Electrons deeper into/below the surface of the metal require more energy to
overcome work function and therefore have less KE(1)
Maximum KE = Energy of photon - work function ø (1)
, 2
Explain how (bright ring) diagram is evidence of the wave-particle duality of
electrons? - correct-answer -Diffraction pattern maxima/minima (bright and dark
areas) (1)
Diffraction is a property of waves- proves wave-behaviour of electrons (1)
What is meant by the ground state? - correct-answer -The lowest energy state of
an atom
conditions for equilibrium - correct-answer -resultant force is 0 (1) resultant
torque is 0 (1)
difference between scalar and vector - correct-answer -vector has magnitude and
direction scalar only has magnitude
definition of elastic limit - correct-answer -maximum force/load which can be
applied to the object without it being permanently deformed
define hookes law - correct-answer -Extension is proportional to the applied force
up to limit of proportionality (1)
