Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/√2 2/√5 1/√5 1/3 1/√2 2/√5 1/√5 1/3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to reduce the magnetizing current. reduce the chance of cogging. increase the starting torque. reduce the chance of crawling. reduce the magnetizing current. reduce the chance of cogging. increase the starting torque. reduce the chance of crawling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Drop in speed from no load to full load is very high in Shunt motor with interpoles. Cummulative compound motor with interpoles. Series motor without interpoles. Series motor with interpoles. Shunt motor with interpoles. Cummulative compound motor with interpoles. Series motor without interpoles. Series motor with interpoles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is suitable for frequent starting and stoppings? All of these Resistance split phase motor Capacitor start capacitor run motor Capacitor start motor All of these Resistance split phase motor Capacitor start capacitor run motor Capacitor start motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The 3 - Φ induction motor with rotor circuit open will run normally. make noise. get over heated. not run. run normally. make noise. get over heated. not run. ANSWER DOWNLOAD EXAMIANS APP
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