Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 230 V. 200 V. 115 V. 460 V. 230 V. 200 V. 115 V. 460 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Has a poor torque. Has a almost constant speed. Can be started easily without load. Has its field winding consinting of thick wire and less no of turns. Has a poor torque. Has a almost constant speed. Can be started easily without load. Has its field winding consinting of thick wire and less no of turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to poor lubrication. overheating of winding. overload. uneven air gap. poor lubrication. overheating of winding. overload. uneven air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is done in speed control of DC motor by field flux control? Inserting an additional resistance in the armature circuit. Any of above. Inserting an additional resistance in the field circuit. Inserting resistance to armature circuit and field circuit. Inserting an additional resistance in the armature circuit. Any of above. Inserting an additional resistance in the field circuit. Inserting resistance to armature circuit and field circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? armature resistance control field weakening method None of these same in both methods armature resistance control field weakening method None of these same in both methods ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The self induced emf in the coil undergoing commutation is called the statically induced voltage. dynamically induced voltage. None of these reactance voltage. statically induced voltage. dynamically induced voltage. None of these reactance voltage. ANSWER DOWNLOAD EXAMIANS APP
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