AQA AS level Physics questions with correct and complete answers

Acceleration The rate of change of velocity Accurate result A result that is close to the true answer Apha decay A type of decay in which an unstable nucleus of an atom emits an alpha particle Alternating current A current that changes with time in a regular cycle Ammeter A component used to measure the current flowing through a circuit Amplitude The maximum displacement of a wave Angle of incidence The angle that incoming light makes to the normal or a boundry Angle of refraction The angle that incoming light makes to the normal of a boundary Annihilation The process by which a particle and its antiparticle meet and their mass gets converted to energy in the form of a pair of gamma ray photons Anomalous result A result that doesn't fit in with the pattern of the other results in a set of data Antimatter The name given to all antiparticles Antineutrino The antiparticle of a neutrino Antiparticle A particle with the same rest mass and energy as its corresponding particle but equal and opposite charge Atom A particle made up of protons and neutrons in a central nucleus and electrons orbiting the nucleus Atomic number The number of protons in an atom of an element Baryon A type of hardon made up of three quarks Baryon number The number of baryons in a particle Beta-minus decay A type of decay in which an unstable nucleus of an atom emits a beta-minus particle (an electron) and an antineutrino Breaking stress The lowest stress that is big enough to break a material Brittle A brittle material doesn't deform plastically but snaps when the stress on it reaches a certain point ` Brittle fracture When a stress app;lied to a brittle material causes tiny cracks at the materials surface to get bigger until the material breaks completely Categoric data Data that can be sorted into categories Center of mass The point which you can consider all of an object's weight to act through Circuit symbol A pictorial representation of an electrical component Coherent Sources that have the same wavelength and frequency and a fixed phase difference between them are coherent Compressive force A force which squashes something Constructive interface When two waves interfere to make a wave with a larger displacement Coulomb A unit of charge. One coulomb is the amount of charge that passes in one second when the current is one ampere Couple A pair of forces of equal size which act parallel to each other but in opposite directions Critical angle The angle of incidence at which the angle of refraction in 90 degrees