Electricity and magnetism: Properties of magnetic materials and their uses; Direct and alternating current; Behaviour and measurement of resistance; inductance and capacitance. Cells: Electrical and chemical effects; electrolysis; construction of lead acid and alkaline cells; charging of Battery. Transistors and diodes: Diode and rectification of current; Transistor characteristics and application; Working principle and application of the Cathode Ray Oscilloscope. Optics: Review of mirrors and lenses; Defects in lenses; Types of microscopes and telescopes; Particle and wave theories of light; Phenomena and application of interference, diffraction and polarisation of light. Modern physics: Bohr's theory and Heisenberg's quantum concept; Explanation of atomic spectra; X-rays; Structure of the nucleus; Natural and artificial radioactivity; Applications of radioactivity; Introduction to Nuclear fission, fusion and the nuclear reactor.