Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 440 A. 44 A. 40 A. 400 A. 440 A. 44 A. 40 A. 400 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 16.55 Nm Zero 15.28 Nm 15.6 Nm 16.55 Nm Zero 15.28 Nm 15.6 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 95% 94% 96% 92% 95% 94% 96% 92% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 2 and 1 4 and 2 2 and 2 4 ang 1 2 and 1 4 and 2 2 and 2 4 ang 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On switching a DC motor to DC supply mains, it is found to rotate in the direction opposite to that for which it is designed. The DC motor is have an equal number of electrons and protons. Differentical compound. Series shunt. Cummulative compound. have an equal number of electrons and protons. Differentical compound. Series shunt. Cummulative compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because none of above. induction motor will become synchronous motor. rotor torque will not be produced. air friction will prevent it. none of above. induction motor will become synchronous motor. rotor torque will not be produced. air friction will prevent it. ANSWER DOWNLOAD EXAMIANS APP
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