AQA A-Level Physics Paper 2 Definations (+ Turning Points) Exam with Questions
and Answers – 100% Solved
Activity level (nuclear) - ✔✔✔-Number of unstable nuclei that disintegrate per second,
measured in Bq
Angular acceleration - ✔✔✔-change of angular velocity per time
Angular speed (w) - ✔✔✔-Angle through which a point on a rotating object rotates through per
second
Background radiation - ✔✔✔-weak level of radiation found everywhere
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
black body - ✔✔✔-Emitter and absorber of all wavelengths electromagnetic radiation
boyles law - ✔✔✔-for an ideal gas under constant temperature p and v are inversely
proportional
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 molecules in the gas or liquid.
capacitance - ✔✔✔-amount of charge a capacitor can hold per unit potential difference 1V
across it
capacitor - ✔✔✔-Electrical component that can store charge, consists of 2 plates with dielectric
between them.
, AQA A-Level Physics Paper 2 Definations (+ Turning Points) Exam with Questions
and Answers – 100% Solved
centripetal force - ✔✔✔-force which causes an object to travel in circular motion. Always
directed towards the centre
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.
charle's law - ✔✔✔-V is proportional to T under constant pressure
constructive interference - ✔✔✔-when two waves interfere to create a wave with a larger
amplitude
control rod - ✔✔✔-Rod inserted into nuclear reaction to control rate of fission by absorbing
neutrons
Coulombs Law - ✔✔✔-The electric force between 2 point charges is proportional to the product
of the 2 charges and inversely proportional to the square of the distance between them
couple - ✔✔✔-pair of forces, equal, opposite in direction and parallel to one another causing
rotation but no linear motion
critical damping - ✔✔✔-Damping such that the amplitude is reduced in the shortest time
possible
critical mass - ✔✔✔-mass needed for a fission chain reaction so reaction can occur at a steady
rate on its own
damping - ✔✔✔-Force which causes an oscillating object to lose energy and therefore causes
the amplitude of objects oscillation to decrease
and Answers – 100% Solved
Activity level (nuclear) - ✔✔✔-Number of unstable nuclei that disintegrate per second,
measured in Bq
Angular acceleration - ✔✔✔-change of angular velocity per time
Angular speed (w) - ✔✔✔-Angle through which a point on a rotating object rotates through per
second
Background radiation - ✔✔✔-weak level of radiation found everywhere
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
black body - ✔✔✔-Emitter and absorber of all wavelengths electromagnetic radiation
boyles law - ✔✔✔-for an ideal gas under constant temperature p and v are inversely
proportional
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 molecules in the gas or liquid.
capacitance - ✔✔✔-amount of charge a capacitor can hold per unit potential difference 1V
across it
capacitor - ✔✔✔-Electrical component that can store charge, consists of 2 plates with dielectric
between them.
, AQA A-Level Physics Paper 2 Definations (+ Turning Points) Exam with Questions
and Answers – 100% Solved
centripetal force - ✔✔✔-force which causes an object to travel in circular motion. Always
directed towards the centre
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.
charle's law - ✔✔✔-V is proportional to T under constant pressure
constructive interference - ✔✔✔-when two waves interfere to create a wave with a larger
amplitude
control rod - ✔✔✔-Rod inserted into nuclear reaction to control rate of fission by absorbing
neutrons
Coulombs Law - ✔✔✔-The electric force between 2 point charges is proportional to the product
of the 2 charges and inversely proportional to the square of the distance between them
couple - ✔✔✔-pair of forces, equal, opposite in direction and parallel to one another causing
rotation but no linear motion
critical damping - ✔✔✔-Damping such that the amplitude is reduced in the shortest time
possible
critical mass - ✔✔✔-mass needed for a fission chain reaction so reaction can occur at a steady
rate on its own
damping - ✔✔✔-Force which causes an oscillating object to lose energy and therefore causes
the amplitude of objects oscillation to decrease
