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alternating current ammeter ampere-turns amperes angle anode current anode voltage applied armature armature current assumed brushes Calculate candlepower capacitance cathode cent charge coil component condenser conductor connected in series constant copper copper loss core cross-sectional area current taken curve dielectric direction e.m.f. induced e.s. units efficiency electric flux electric flux density electrons expression farads filament flux density frequency full-load galvanometer gas-filled gauss Hence hysteresis loop impedance increase induction motor inductive reactance instantaneous value iron loss lamp leakage flux line current load machine magnetic field magnetising force maximum value mercury-vapour lamp mutual inductance negative ohms output parallel permittivity phase plates positive power factor Pract r.m.s. value rectifier represented rotating rotor secondary windings short-circuited shown in Fig single-phase sinusoidal slots speed star-connected stator stator winding supply voltage synchronous terminal voltage three-phase torque transformer triode vector diagram voltage and current volts wattmeter watts zero