Physics AS Level AQA Exam Questions and Answers 100% Pass

Physics AS Level AQA Exam Questions and Answers 100% Pass Acceleration - Answer- change in V per unit t Accurate - Answer- Measurement obtained using calibrated instruments correctly Alpha radiation - Answer- Particle consisting of 2 P's and 2 N's Amplitude - Answer- Max displacement of oscillating particle from equilibrium position Annihilation - Answer- Particle and antiparticle meet, destroy eachother and emit radiation Antibaryon - Answer- Hadron w/ 3 quarks Antimatter - Answer- Antiparticles with same quantum values but opposite charge to corresponding particles Antinode - Answer- Fixed point on stationary wave where amplitude is maximum Atomic number Z - Answer- Number of P's in atom nucleus Baryon - Answer- Hadron w/ 3 quarks Base units - Answer- Units that define the SI system: Kg Amp S M Beta radiation - Answer- when B- or B+ particles are emitted following decay of a neutron-rich or proton-rich nucleus Breaking stress/Ultimate tensile stress - Answer- Tensile stress needed to break a solid material Brittle - Answer- Snaps without bending or stretching when subject to stress Centre of mass - Answer- Point through which a single force on the body has no turning affect Charge carriers - Answer- Charged particles that move through substance when PD applied across it Kirchoff's 1st Law - Answer- Current passing through 2 or more components in series is the same through each component At a junction the total current in = total current out Kirchoff's 2 Law - Answer- 2 or more components in series - total PD across all the components is = to sum of the PD's across each component Sum of emf's around complete loop = sum of PD's around the loop Coherent - Answer- Constant phase difference and same frequency Conservation rules - Answer- Rule that: Baryon no Lepton no Charge Energy Momentum always conserved in interactions When is strangeness conserved? - Answer- Strong interactions How are strange particles created? - Answer- Strong interactions How to strange particles decay? - Answer- Weak interactions Couple - Answer- Pair of equal and opposite forces acting upon the same body but not along the same line Critical angle - Answer- The angle of incidence of a light ray must exceed this angle for total internal reflection to occur Critical temperature - Answer- Temperature at or below which a superconducting material has zero resistivity Cycle - Answer- Interval for an oscillating particle from a certain displacement and velocity to the next time the particle has identical displacement and velocity de Broglie wavelength - Answer- Wavelength of a matter particle deexcitation - Answer- process by which atom loses energy by photon emission as electron moves to lower energy level - inner shell density - Answer- mass per unit volume for substance diffraction - Answer- spreading out of waves that pass through gap or near edge diffraction grating - Answer- plate with close parallel slits on it dispersion - Answer- splitting of beam of white light into colours by prism displacement - Answer- distance in a given direction from eq