**AC Circuits :** Sinusoidal voltage and
current, waveforms, RMS and average value, form factor, crest factor, frequency,
periodic time, behaviour of resistance, inductance and capacitance in AC
circuit, RLC series and parallel circuit, phasor diagram, resonance, bandwidth
and quality factor.

**Polyphase Circuits :** Three phase system of
voltages and currents, star and delta connection, balanced three phase circuit,
relationship between line and phase currents and voltages, phasor diagram, power
in three phase circuits, measurement of power by one wattmeter, two wattmeter
and three wattmeter methods.

**Transformers :** Construction of single phase
transformers, function and working principle,

development of equivalent circuit, phasor diagram,
O.C. and S.C. tests, efficiency and regulation, all day efficiency, condition
for maximum efficiency.

**Semiconductor Electronics :** PN diode
construction, characteristics, effect of temperature on diode, rectification
using diodes, C, L, LC and PI filters. BJT construction, characteristics, CE, CB
and CC configuration.