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Magnetic poles Unit pole Magnetic field Lines of force Field due to
mechanics Mutual induction Electromagnets Magnetic properties
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accordingly alternating currents alternating-current ammeter ampere-hours amperes angle armature conductors armature core armature current armature winding brushes bus bars capacitance capacity cell cent central station charge coil commutator connected copper counter-electromotive force current flows curve cycle delivered direct currents direct-current discharge distribution dynamo effective value efficiency elec electrical energy electromotive force equal equation excitation field winding flux density frequency full load fuse gausses heat increasing induction motor instantaneous values insulation iron losses machine magnetic circuit magnetic field magnetic flux magnetomotive force mains maximum motive force operation output path phase placed plates polyphase potential power factor practice reactance resistance reversed rheostat rotating rotor secondary series motor shown in Fig shunt field single-phase sinusoidal stator storage battery supply switch synchronous motor synchronous speed terminal voltage three-phase tion torque transformer transmission varies vector diagram voltmeter volts watt-hour meter wave-form wire zero