AQA A-level Physics Paper 2 Definitions (+turning
points)
1. Activity level (nuclear): Number of unstable nuclei that disintegrate per
second, measured in Bq
2. Angular speed (w): Angle through which a point on a rotating object
rotates through per second
3. Angular acceleration: change of angular velocity per time
4. Background radiation: weak level of radiation found everywhere
5. Binding energy: energy released when forming a nucleus from it's
constituent nucleons. Also the energy required to separate all the
nucleons in the nucleus. Equivalent to mass defect
6. black body: Emitter and absorber of all wavelengths electromagnetic
radiation
7. boyles law: for an ideal gas under constant temperature p and v are
inversely proportional
8. brownian motion: the random motion of particles suspended in a fluid
(a liquid or a gas) resulting from their collision with the quick atoms or
1/
, molecules in the gas or liquid.
9. capacitance: amount of charge a capacitor can hold per unit potential
difference 1V across it
10.capacitor: Electrical component that can store charge, consists of 2
plates with dielectric between them.
11.centripetal force: force which causes an object to travel in circular
motion. Always directed towards the centre
12.chain reaction: When a nuclei splits by absorbing a neutron and then
releases more neutrons, which go on to cause more nuclei to fission and
so on.
13.charle's law: V is proportional to T under constant pressure
14.constructive interference: when two waves interfere to create a
wave with a larger amplitude
15.control rod: Rod inserted into nuclear reaction to control rate of
fission by absorbing neutrons
16.couple: pair of forces, equal, opposite in direction and parallel to
one another causing rotation but no linear motion
17.critical damping: Damping such that the amplitude is reduced in the
shortest time possible
2/
points)
1. Activity level (nuclear): Number of unstable nuclei that disintegrate per
second, measured in Bq
2. Angular speed (w): Angle through which a point on a rotating object
rotates through per second
3. Angular acceleration: change of angular velocity per time
4. Background radiation: weak level of radiation found everywhere
5. Binding energy: energy released when forming a nucleus from it's
constituent nucleons. Also the energy required to separate all the
nucleons in the nucleus. Equivalent to mass defect
6. black body: Emitter and absorber of all wavelengths electromagnetic
radiation
7. boyles law: for an ideal gas under constant temperature p and v are
inversely proportional
8. brownian motion: the random motion of particles suspended in a fluid
(a liquid or a gas) resulting from their collision with the quick atoms or
1/
, molecules in the gas or liquid.
9. capacitance: amount of charge a capacitor can hold per unit potential
difference 1V across it
10.capacitor: Electrical component that can store charge, consists of 2
plates with dielectric between them.
11.centripetal force: force which causes an object to travel in circular
motion. Always directed towards the centre
12.chain reaction: When a nuclei splits by absorbing a neutron and then
releases more neutrons, which go on to cause more nuclei to fission and
so on.
13.charle's law: V is proportional to T under constant pressure
14.constructive interference: when two waves interfere to create a
wave with a larger amplitude
15.control rod: Rod inserted into nuclear reaction to control rate of
fission by absorbing neutrons
16.couple: pair of forces, equal, opposite in direction and parallel to
one another causing rotation but no linear motion
17.critical damping: Damping such that the amplitude is reduced in the
shortest time possible
2/
