Electrical Machines In double cage induction motor, the inner cage offers low resistance and low reactance. high resistance and low reactance. high resistance and high reactance. low resistance and high reactance. low resistance and low reactance. high resistance and low reactance. high resistance and high reactance. low resistance and high reactance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. increased. kept constant to certain value. decreased. remains unchanged. increased. kept constant to certain value. decreased. remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 220 V. 225 V. 230 V. 222 V. 220 V. 225 V. 230 V. 222 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing of DC generator means None of these creation of residual magnetism by a DC source. increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. None of these creation of residual magnetism by a DC source. increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be B - C - A or C - A - B. B - C - A. A - C - B. C - A - B. B - C - A or C - A - B. B - C - A. A - C - B. C - A - B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? -3% +3% +3.33% -3.33% -3% +3% +3.33% -3.33% ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS