Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors. Calculate the back emf produced when it is running at a speed of 1500 rpm. 440 volt. 240 volt. 230 volt. 220 volt. 440 volt. 240 volt. 230 volt. 220 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies in none of above positions. in any of above positions. along field axis. along neutral axis. in none of above positions. in any of above positions. along field axis. along neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation can be determined by which of the following? Synchronous impedance method. ZPF method. MMf method. All of these Synchronous impedance method. ZPF method. MMf method. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 230 V 460 V 115 V 200 V 230 V 460 V 115 V 200 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ratio of starting torque to full load torque is minimum in Series motor. Shunt motor. Cumulative compound motor. Differential compound motor. Series motor. Shunt motor. Cumulative compound motor. Differential compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For very sensitive and wide speed control, the preferable control method is Ward-Leonard control. Multiple voltage control. Field control. Armature control. Ward-Leonard control. Multiple voltage control. Field control. Armature control. ANSWER DOWNLOAD EXAMIANS APP
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