Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? MNA None of these GNA either GNA or MNA MNA None of these GNA either GNA or MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines CRGO steel is used in the core of transformer to reduce both eddy current and hysteresis loss. eddy current loss. ohmic loss. hysteresis loss. both eddy current and hysteresis loss. eddy current loss. ohmic loss. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be heavily loaded and underexcited lightly loaded and over excited lightly loaded and underecited heavily loaded and over excited heavily loaded and underexcited lightly loaded and over excited lightly loaded and underecited heavily loaded and over excited ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor None of these remains same. increases. decreases. None of these remains same. increases. decreases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated) changes to three times the original value remain the same as the original changes to 1.5 times the original value changes to 0.5 times the original value changes to three times the original value remain the same as the original changes to 1.5 times the original value changes to 0.5 times the original value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical load on it because otherwise it will draw too much current. develop excessive speed and damage itself. open fuse or circuit breaker. produce sparking at brushes. draw too much current. develop excessive speed and damage itself. open fuse or circuit breaker. produce sparking at brushes. ANSWER DOWNLOAD EXAMIANS APP
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