Monitoring & measuring a.c. Peak and rms values, the oscilloscope, and measuring frequency. Current, p.d., power & resistance Charge and current, the series and parallel rules, and power. Electrical sources & internal resistance EMF and lost volts, and finding internal resistance from a graph. Capacitors Capacitance, the energy stored, and charging and discharging. Conductors, semiconductors & p–n junctions Band theory, doping, and the p–n junction as a diode.

Motion — equations & graphs The equations of motion, velocity–time graphs, and projectiles. Coming soon. Forces, energy & power Free body diagrams, components on a slope, and work done. Coming soon. Collisions, explosions & impulse Conservation of momentum, elastic and inelastic, and impulse. Coming soon. Gravitation Newton's inverse square law, gravitational fields and potential. Coming soon. Special relativity Time dilation, length contraction, and the constant speed of light. Coming soon. The expanding universe The Doppler effect, redshift, Hubble's law and dark energy. Coming soon.

Forces on charged particles Fields, accelerating a charge, and paths in a magnetic field. Coming soon. The Standard Model Fermions and bosons, quarks and leptons, and the four forces. Coming soon. Nuclear reactions Fission and fusion, mass defect, and the energy released. Coming soon. Wave–particle duality The photoelectric effect, work function and photon energy. Coming soon. Interference & diffraction Path difference, coherent sources, and the grating equation. Coming soon. Refraction of light Refractive index, the critical angle and total internal reflection. Coming soon. Spectra Emission and absorption spectra, energy levels, and irradiance. Coming soon.