Electrical Machines A self-excited shunt generator fails to build up, because 1. the field circuit is open 2. The armature circuit is open 3. the residual magnetism is absent 4. The direction of rotation is wrong From these, the correct answer is 1, 3 3 only 1, 2 and 3 1, 2, 3 and 4 1, 3 3 only 1, 2 and 3 1, 2, 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as inert medium. both A and B. an insulator. a coolant. inert medium. both A and B. an insulator. a coolant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Generator works on the principle of production None of these both A and B. dynamically induced emf. static induced emf. None of these both A and B. dynamically induced emf. static induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The introduction of interpoles in between the main poles improves the performance of a dc machine, because the interpoles produce additional flux to augment the developed torque the inequality of air-gap flux on the top and bottom halves of the armature is removed a counter-emf is induced in the coil undergoing commutation the flux waveform is improved with reduction in harmonics the interpoles produce additional flux to augment the developed torque the inequality of air-gap flux on the top and bottom halves of the armature is removed a counter-emf is induced in the coil undergoing commutation the flux waveform is improved with reduction in harmonics ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation of the synchronous generator fails, it acts as a/an synchronous generator. induction generator. synchronous motor. induction motor. synchronous generator. induction generator. synchronous motor. induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For larger units high torque it is preferred to use DC shunt motor. Partial motor. Universal motor. Slip induction motor. DC shunt motor. Partial motor. Universal motor. Slip induction motor. ANSWER DOWNLOAD EXAMIANS APP
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