What this topic covers
Concept of electromagnetic field: Identifying the directions of current, magnetic field and force in an electromagnetic field (Fleming's left-hand rule). Electromagnetic induction: Applications include Generator (d.c. and a.c.), induction coil and transformer. Principles underlying the production of direct and alternating currents should be treated. Equation E = E₀ sinwt should be explained. Faraday's law, Lenz's law and motor-generator effect. Inductance: Qualitative explanation of self and mutual inductance. The unit of inductance is henry (H). (E = ½ LI²), application in radio, T.V., transformer (derivation of formula not required). Eddy currents: A method of reducing eddy current losses should be treated. Applications in induction furnace, speedometer, etc. Power transmission and distribution: Reduction of power losses in high-tension transmission lines. Household wiring system should be discussed.
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