Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of None of above. Field current. Armature current. Line current. None of above. Field current. Armature current. Line current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The overall power factor of an on load transformer depends on the power factor of the load. is always lagging. is always unity. is always leading. depends on the power factor of the load. is always lagging. is always unity. is always leading. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is zero minimum maximum All of these zero minimum maximum All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 0.62. 0.25. 1.24. 0.72. 0.62. 0.25. 1.24. 0.72. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For very sensitive and wide speed control, the preferable control method is Field control. Armature control. Multiple voltage control. Ward-Leonard control. Field control. Armature control. Multiple voltage control. Ward-Leonard control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 75 rpm 1500 rpm 375 rpm 3000 rpm 75 rpm 1500 rpm 375 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
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