Electrical Machines Alternator operates on the principle of self induction. mutual induction. electromagnetic induction. self or mutual induction. self induction. mutual induction. electromagnetic induction. self or mutual induction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will remains same. increase. Decrease.d none of these. remains same. increase. Decrease.d none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as relative speed. crawling. cogging. air gap. relative speed. crawling. cogging. air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The effect of ------------------ on main field flux is armature reaction? armature flux All of these armature mmf armature current armature flux All of these armature mmf armature current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The self induced emf in the coil undergoing commutation is called the reactance voltage. dynamically induced voltage. statically induced voltage. None of these reactance voltage. dynamically induced voltage. statically induced voltage. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf in armature are alternating. current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf in armature are alternating. ANSWER DOWNLOAD EXAMIANS APP
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