Wales · WJECQ&A
PhysicsQ&A by dot point
A short Q&A bank for every Wales Physics syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Unit 2 Electricity and Light
- Current as the rate of flow of charge, the equation I = nAve linking current to charge-carrier density and drift velocity, and conductors, semiconductors and insulators.3Q&A pairs
- Kirchhoff's first and second laws, series and parallel resistors, EMF and internal resistance, and the potential divider.3Q&A pairs
- Energy levels and photon emission, spontaneous and stimulated emission, population inversion and pumping, and the properties of laser light.3Q&A pairs
- The photon model and E = hf, the photoelectric effect, Einstein's photoelectric equation, the work function and threshold frequency.3Q&A pairs
- Refraction and refractive index, Snell's law, the critical angle, total internal reflection, and optical fibres.3Q&A pairs
- Resistance, Ohm's law, I-V characteristics of a metal, filament lamp and diode, resistivity, and the effect of temperature.4Q&A pairs
- Transverse and longitudinal waves, amplitude, wavelength, frequency, period and phase, the wave equation, and polarisation.2Q&A pairs
- Superposition and coherence, two-source interference and path difference, diffraction, and the diffraction grating equation.4Q&A pairs
Unit 4 Fields and their Applications
- Capacitance and the charge stored, the energy stored in a capacitor, and exponential charge and discharge through a resistor with time constant RC.3Q&A pairs
- Magnetic flux and flux linkage, Faraday's law, Lenz's law, and applications in generators and transformers.3Q&A pairs
- Coulomb's law and Newton's law of gravitation, electric and gravitational field strength and potential, and the inverse-square nature of both fields.4Q&A pairs
- Magnetic flux density, the force on a current-carrying conductor, the force on a moving charge, and Fleming's left-hand rule.5Q&A pairs
- Circular orbits under gravity, Kepler's third law, satellites and escape, and evidence for dark matter from galactic rotation.5Q&A pairs
Unit 1 Motion, Energy and Matter
- SI units and prefixes, homogeneity of equations, scalars and vectors, resolving and adding vectors, density, and the equilibrium of coplanar forces including moments.2Q&A pairs
- Newton's three laws of motion, force as the rate of change of momentum, conservation of momentum, and elastic and inelastic collisions.4Q&A pairs
- Work done by a force, kinetic and gravitational potential energy, conservation of energy, power, and efficiency.3Q&A pairs
- Displacement, velocity and acceleration, interpreting motion graphs, the equations of motion for constant acceleration, and projectile motion.7Q&A pairs
- Quarks and leptons, antiparticles, baryons and mesons, conservation laws of charge, baryon and lepton number, and beta decay at the quark level.3Q&A pairs
- Hooke's law, stress, strain and the Young modulus, elastic and plastic behaviour, stress-strain graphs, and elastic strain energy.3Q&A pairs
- Black-body radiation, Wien's displacement law, Stefan's law, the inverse-square law of intensity, and stellar spectra.3Q&A pairs
Unit 3 Oscillations and Nuclei
- Angular velocity, the link between speed and angular velocity, centripetal acceleration and centripetal force.4Q&A pairs
- The gas laws and the ideal gas equation, the kinetic theory derivation, and the link between molecular kinetic energy and temperature.3Q&A pairs
- Random and spontaneous decay, the decay law, activity, the decay constant and half-life, and the properties of alpha, beta and gamma radiation.2Q&A pairs
- Mass-energy equivalence, the mass defect and binding energy, binding energy per nucleon, and nuclear fission and fusion.3Q&A pairs
- Internal energy and temperature, specific heat capacity, specific latent heat, and thermal equilibrium.4Q&A pairs
- The defining equation of SHM, sinusoidal solutions, energy in SHM, the mass-spring and pendulum periods, damping and resonance.2Q&A pairs