Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 3000 rpm 1500 rpm 1000 rpm 750 rpm 3000 rpm 1500 rpm 1000 rpm 750 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed? The speed will increase gradually. The speed will increase abruptly. The speed will remains almost constant. The speed will increase in proportion to reduction in load. The speed will increase gradually. The speed will increase abruptly. The speed will remains almost constant. The speed will increase in proportion to reduction in load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be 25 kW. 23.06 kW. 24.11 kW. 26.21 kW. 25 kW. 23.06 kW. 24.11 kW. 26.21 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will decrease. remain unaltered. increase. become execessively high. decrease. remain unaltered. increase. become execessively high. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve high efficiency. low starting torque. quick acceleration. reduced size. high efficiency. low starting torque. quick acceleration. reduced size. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging in induction motor occurs when number of stator teeth - number of rotor teeth = negative number. number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = 0. number of stator teeth - number of rotor teeth = negative number. number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = 0. ANSWER DOWNLOAD EXAMIANS APP
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