DC & AC Circuits : Ohm’s law, Kirchhoff’s laws, Series & parallel circuits, Star & Delta conversions, Thevenin’s, Norton’s and Superposition theorems (analysis with DC excitation only). A.C. Circuits : Production of sinusoidal voltage, Phasor representation of sinusoidal quantities, Average & rms values, Form factor, RLC circuits excited by sinusoidal input. Active & reactive power, power factor.
3-Phase Balanced Circuits: Star & Delta connections, Measurement of 3-phase power by two-wattmeter method. Single-Phase Transformers Principle of operation, Constructional details, Transformer on no-load and on load, OC & SC tests, Losses, Efficiency, Regulation.
DC Generator: Principle of operation, Constructional details, EMF equation, Types of generators, Armature reaction, No-load & Load characteristics, Losses & efficiency, Applications.
DC Motor: Principle of operation, Types of motors, Torque equation, 3-point starter, Characteristics of DC motors, Speed control of DC shunt motor, Losses & efficiency, Applications.
Three-phase Induction Motor: Production of rotating field, Constructicoal details. Types 01 motors, Torque-slip characterstics, Star-delta starter, Auto-transformer starter, Losses & eMdency, Applications.
Single-phase Induction Motors: Principle of operation, Capacitor run & Capacitor start motor, Applications.
Tariff & Electrical Safety Measures; Types of Tariff: Simple tariff, Flat demand tariff, Flat rate tart, Step rate tariff, Block rate tariff, Two-pan tariff. Types of consumers and their tariff. Power Factor: Disadvantage of low P.F., Causes of low P.F., Improvement of P.F. by using Static Capacitors. Electrical Safety Measures: Earthing and Its Importance, Safety practices, Basic ideas of Fuse, Circuit Breaker, and relay.