Book Description

D. C. CircuitConcept of EMF, P.D. and current, Resistance, Effect of temperature of resistance, resistance-temperature co-efficient, Classification of electric network. Ohm's law, Kirchoff's law and their application for network solution, Simplification of network using series and parallel combination and star delta transformation.Magnetic CircuitMagnetic effect of electric current, Law of magnetic force, Magnetic field, Concept of mmf, Magnetic flux, Flux density, Reluctance permeability and field strength and their units. Cross and dot convention current, Simple series and parallel magnetic circuit, Comparison between electric circuit and magnetic circuit, Force on current carrying conductor in magnetic field, Fleming's rules.A. C. FundamentalsRepresentation of an a.c. source polarity of a.c. source, Generation of a.c. voltage, Concept of instantaneous, Peak, Average and r.m.s values cycle, Period, Frequency, Peak factor and form factor phase difference , Phasor representation and indication of phase difference in it. Rectangular and polar representation of phasor.A.C. CircuitStudy of a.c. circuit consisting of purely resistive, Purely inductive, Purely capacitive type and corresponding voltage and current phasor diagram. Concept of reactance. Study of series and parallel circuit consisting resistance, Inductance and capacitance and its phasor, Combination of to develop the concept of impedance, Admittance, Conductance,Susceptance.Necessity of earthing, Its types, Fuses safety precaution in working with electricity, Circuit and operation of filament lamp. Fluorescent tube, Mercury vapour, Sodium vapour lamp.