Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 460 V. 200 V. 115 V. 230 V. 460 V. 200 V. 115 V. 230 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? All of these Iron loss Rotational loss Copper loss All of these Iron loss Rotational loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slot wedges in a dc machine is made up of silicon steel. mild steel. fibre. cast iron. silicon steel. mild steel. fibre. cast iron. 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 3000 rpm 1500 rpm 375 rpm 75 rpm 3000 rpm 1500 rpm 375 rpm 75 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because rotor torque will not be produced. induction motor will become synchronous motor. air friction will prevent it. none of above. rotor torque will not be produced. induction motor will become synchronous motor. air friction will prevent it. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a DC series motor is Inversely proportional to the armature current. Proportional to the square of the armature current. Proportional to the armature current. Proportional to field current. Inversely proportional to the armature current. Proportional to the square of the armature current. Proportional to the armature current. Proportional to field current. ANSWER DOWNLOAD EXAMIANS APP
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