AQA A LEVEL PHYSICS PAPER 2 COMPLETE GUIDE WITH 100%
RATED 100+ QUESTIONS AND ANSWERS | GRADED A+ | 2025
LATEST UPDATED | LATEST VERSIONS
what is meant by specific heat capacity - (ANSWER)the energy needed to raise the temperature
of 1kg of material by 1C.
define avogadro's constant - (ANSWER)the number of atoms in 12g of carbon 12 (OR the no.
of particles/atoms in one mole of a substance)
define the specific latent heat of vaporisation of water - (ANSWER)the energy required to
change the state of a unit mass of water to gas (1) without a change in temperature (1)
features of an ideal gas (3) - (ANSWER)- collisions are elastic
- molecules have negligible volume
- gas obeys ideal gas law (Boyles law)
assumptions made in the molecular kinetic theory of an ideal gas - (ANSWER)- all molecules
are identical
- molecules in random motion
- newtonian mechanics apply
- vol of gas molecules negligible (compared to vol of gas)
- collisions are elastic
state and explain what happens to the speed of molecules in a gas when the temperature increases
- (ANSWER)the average/mean speed of molecules increases (1) as mean ke proportional to
absolute temp
state what is meant by an elastic collision - (ANSWER)a collision in which ke is conserved
, two different gases at the same temp have molecules with different mean square speeds. explain
how this is possible - (ANSWER)masses are different (1) but because ke same, mean square
speeds must be different
why does the total ke of an ideal gas equal the total internal energy of an ideal gas -
(ANSWER)molecules have no potential energy (1) no elastic collisions occur
Explain what is meant by the binding energy of a nucleus - (ANSWER)the energy required to
split up the nucleus (1) into individual nucleons (1)
3 sources of background radiation - (ANSWER)Rocks (1)
the sun (1)
cosmic rays (1)
What is meant by the decay constant? - (ANSWER)probability of decay per unit time
Describe the changes made inside a nuclear reactor to reduce its power output and explain the
process involved - (ANSWER)insert control rods (further) into the nuclear core / reactor (1)
which will absorb (more) neutrons (reducing further fission reactions) (1)
State the main source of the highly radioactive waste from a nuclear reactor. -
(ANSWER)fission fragments / daughter products OR spent / used fuel / uranium rods (1)
Line of force - (ANSWER)Direction a hypothetical "free north pole" would travel in the field.
Otherwise known as a field line.
Motor effect - (ANSWER)Effect in which a current in a magnetic field experiences a force.
Fleming's left hand rule - (ANSWER)Way of working out the directions involved in the motor
effect.
RATED 100+ QUESTIONS AND ANSWERS | GRADED A+ | 2025
LATEST UPDATED | LATEST VERSIONS
what is meant by specific heat capacity - (ANSWER)the energy needed to raise the temperature
of 1kg of material by 1C.
define avogadro's constant - (ANSWER)the number of atoms in 12g of carbon 12 (OR the no.
of particles/atoms in one mole of a substance)
define the specific latent heat of vaporisation of water - (ANSWER)the energy required to
change the state of a unit mass of water to gas (1) without a change in temperature (1)
features of an ideal gas (3) - (ANSWER)- collisions are elastic
- molecules have negligible volume
- gas obeys ideal gas law (Boyles law)
assumptions made in the molecular kinetic theory of an ideal gas - (ANSWER)- all molecules
are identical
- molecules in random motion
- newtonian mechanics apply
- vol of gas molecules negligible (compared to vol of gas)
- collisions are elastic
state and explain what happens to the speed of molecules in a gas when the temperature increases
- (ANSWER)the average/mean speed of molecules increases (1) as mean ke proportional to
absolute temp
state what is meant by an elastic collision - (ANSWER)a collision in which ke is conserved
, two different gases at the same temp have molecules with different mean square speeds. explain
how this is possible - (ANSWER)masses are different (1) but because ke same, mean square
speeds must be different
why does the total ke of an ideal gas equal the total internal energy of an ideal gas -
(ANSWER)molecules have no potential energy (1) no elastic collisions occur
Explain what is meant by the binding energy of a nucleus - (ANSWER)the energy required to
split up the nucleus (1) into individual nucleons (1)
3 sources of background radiation - (ANSWER)Rocks (1)
the sun (1)
cosmic rays (1)
What is meant by the decay constant? - (ANSWER)probability of decay per unit time
Describe the changes made inside a nuclear reactor to reduce its power output and explain the
process involved - (ANSWER)insert control rods (further) into the nuclear core / reactor (1)
which will absorb (more) neutrons (reducing further fission reactions) (1)
State the main source of the highly radioactive waste from a nuclear reactor. -
(ANSWER)fission fragments / daughter products OR spent / used fuel / uranium rods (1)
Line of force - (ANSWER)Direction a hypothetical "free north pole" would travel in the field.
Otherwise known as a field line.
Motor effect - (ANSWER)Effect in which a current in a magnetic field experiences a force.
Fleming's left hand rule - (ANSWER)Way of working out the directions involved in the motor
effect.
