AS level Physics - AQA A Graded A+

AS level Physics - AQA A Graded A+ Acceleration Accurate result Apha decay The rate of change of velocity A result that is close to the true answer A type of decay in which an unstable nucleus of an atom emits an alpha particle Alternating current Ammeter A current that changes with time in a regular cycle A component used to measure the current flowing through a circuit Amplitude The maximum displacement of a wave Angle of incidence Angle of refraction Annihilation The angle that incoming light makes to the normal or a boundry The angle that incoming light makes to the normal of a boundary 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 Antimatter A result that doesn't fit in with the pattern of the other results in a set of data The name given to all antiparticles Antineutrino Antiparticle The antiparticle of a neutrino 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 Baryon The number of protons in an atom of an element A type of hardon made up of three quarks Baryon number Beta-minus decay The number of baryons in a particle A type of decay in which an unstable nucleus of an atom emits a beta-minus particle (an electron) and an antineutrino Breaking stress Brittle The lowest stress that is big enough to break a material 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 Center of mass Circuit symbol Coherent Data that can be sorted into categories The point which you can consider all of an object's weight to act through A pictorial representation of an electrical component Sources that have the same wavelength and frequency and a fixed phase difference between them are coherent Compressive force Constructive interface A force which squashes something 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 Current The angle of incidence at which the angle of refraction in 90 degrees The rate of flow of charge in a circuit, measures in amperes Continuous data Density Data that can have any value on a scale The mass per unit volume of a material or object Dependent variable The cariable that you measure in an experiment Destructive interference Diffraction When two waves interfere to make a wave with a reduced displacement When waves spread out as they pass through a narrow gap or go round obstacles Diffraction grating A slide or other thin object that contains lots of equally spaced slits very close together, used to show diffraction patterns of waves Diode A component designed to allow current flow in one direction only. Directly proportional A change in ove variable results in a change in the other variable, the changes are always related by the same constant Discrete data Displacement Data that can only take certain values How far an object has traveled from its starting point in a given direction in the case of a wave, it is the distance a point on a wave has moved from its undisturbed position Drag Friction caused by a fluid (gas or liquid) Efficiency machine Elastic removed Elastic limit The ratio of useful energy given out by a machine to the amount of energy put into the An elastic material returns to its original shape/length once the forces acting on it are The force beyond which a material will be permanently stretched Elastic strain energy Electromagnetic force The energy stored in a stretched material A fundamental force that causes interactions between charged particles. Virtual photons are the exchange particle Electromagnetic spectrum electromagnetic radiation Electromotive force (E.M.F) coulomb of charge Electron A continuous spectrum of all the possible frequencies of The amount of electrical energy a power supply transfers to each A lepton with a relative charge of -1 and a relative mass of 0.0005. Electron capture The process of a proton rich nucleus capturing an electron to turn a proton into a neutron, emitting a neutrino Electron proton collision neutron and a neutrino Electron volt The process of an electron colliding with a proton and producing a The kinetic energy carried by an electron after it has been accelerated through