AQA A level Physics Paper 1 Exam questions with Answers

AQA A level Physics Paper 1 Exam questions with Answers Critical Temperature - answersThe temperature below which a material will have zero resistance and will become a superconductor Power - answersThe rate of transfer of energy EMF - answersThe work done in moving a unit charge through a battery Lost Volts - answersWork done per unit charge in overcoming the internal resistance within a battery Terminal PD - answersThe potential difference between the two terminals of the power supply Potential Divider - answersA circuit with a constant voltage source and more than one resistor connected in series that can be used to vary the output voltage Threshold Frequency - answersThe minimum frequency that must be incident on the surface of a metal for the emission of photoelectrons to occur Electromagnetic Force - answersA fundamental force that causes interactions between charged particules. Virtual photons are the exchange particles Gravitational Force - answersA fundamental force which causes attraction between objects with a force proportional to their mass Strong Nuclear Force - answersA fundamental force with a short range which is attractive between 0.5-3 fm and repulsive between 0-0.5fm Alpha Decay - answersOccurs in nuclei of 82 protons or more that consists of an alpha particle being emitted Photons - answersVirtual particles that are discrete packets of energy Antiparticle - answersOpposite in charge to the particle but have the same rest mass and rest energy PET Scan - answersPositron Emission Tomography Rest Energy - answersThe amount of energy that would be produced if all of a particle's mass was transformed into energy Fundamental Particle - answersA particle that cannot be split up into smaller particles Stopping Potential - answersThe work done by the potential difference in stopping the fastest moving electrons Electron Volt - answersThe kinetic energy that an electron has after being accelerated from rest through a potential difference of 1 volt 1 eV = - answers1.6x10^-19 Joules Ground State - answersThe lowest energy level that an electron can occupy in an atom (n=1) Excitation - answersWhen an electron gains the exact amount of energy needed to move up to a higher energy level in an atom Ionisation - answersThe process when an electron gains enough energy from a photon to leave the ground state of the atom that it's in Ionisation Energy - answersThe amount of energy needed to remove an electron from the ground state of an atom Radian - answersThe angle that is equal to the arc length divided by the radius of the circle 2pi radians = 360 degrees Angular Speed - answersThe angle an object rotated through per second (omega = 2pi x frequency) Frequency - answersThe number of complete revolutions per second Light Damping - answersStops oscillations over many time periods (just air resistance etc) Heavy Damping - answersStops oscillations in few time periods, amplitude gets much smaller each period (like adding a parachute or something) Over Damping - answersStops oscillating over 1 time period but takes longer to return to equilibrium (eg toilet seat) Critical Damping - answersAmplitude of oscillation is reduced to zero in the shortest possible time Density - answersThe ratio of the mass of a substance to its volume Hooke's Law - answersExtension is directly proportional to force applied up to the limit of proportionality Tensile Stress - answersThe ratio of the force applied to an object to its cross sectional area Tensile Strain - answersThe ratio of an object's extension to the original length of the material Breaking Stress - answersThe lowest stress that's big enough to break a material Ultimate Tensile Stress - answersThe maximum stress that a material can withstand Young Modulus - answersThe ratio of stress to strain for a particular material Limit of Proportionality - answersThe point beyond which force is no longer proportional to extension Brittle Material - answersDoesn't deform plastically but snaps when the stress on it reaches a certain point Brittle Fracture - answersWhen a stress applied to a brittle material caused tiny crack at the material's surface to get bigger until the material breaks completely Yield Point - answersThe point at which a material will continue to stretch without any extra load being applied Elastic Limit - answersThe maximum amount that a material can be stretched and still return to its original length when all force is removed Elastic Strain Energy - answersThe energy stored in a stretched material Elastic Collision - answersA collision in which the total momentum and the total kinetic energy are conserved Inelastic Collision - answersA collision where momentum is conserved but kinetic energy is not Principle of Conservation of Energy - answersEnergy cannot be created or destroyed, it can be changed from one form to another, but the total amount of energy in a closed system will not change Scalar - answersA quantity that only has magnitude no direction Vector - answersA quantity that has both magnitude