Electrical Machines DC generator will not build up voltage if field resistance is more than critical resistance. any one of above. if it has lost residual magnetism. due to wrong direction of rotation. if field resistance is more than critical resistance. any one of above. if it has lost residual magnetism. due to wrong direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-winding single-phase motor has zero starting torque. high starting torque. starting torque equal to full-load torque. low starting torque. zero starting torque. high starting torque. starting torque equal to full-load torque. low starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short circuit test on a transformer gives copper loss at any load. copper loss at half load. copper loss at over load. copper loss at full load. copper loss at any load. copper loss at half load. copper loss at over load. copper loss at full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be 1.2 mWb. 2.7 mWb. 1.4 mWb. 3.5 mWb. 1.2 mWb. 2.7 mWb. 1.4 mWb. 3.5 mWb. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of eddy current losses. ohmic losses. mechanical losses. hysteresis losses. eddy current losses. ohmic losses. mechanical losses. hysteresis losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting phenomenon is observed in which motor? DC motor. Both A and C. Induction motor. Synchronous motor. DC motor. Both A and C. Induction motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
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