Electrical Machines An unexcited single phase synchronous motor is reluctance motor. universal motor. repulsion motor. AC series motor. reluctance motor. universal motor. repulsion motor. AC series motor. 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 __________________. kept constant to certain value. decreased. remains unchanged. increased. kept constant to certain value. decreased. remains unchanged. increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor, the starting torque developed is proportional to 1/V² 1/V V² supply voltage V 1/V² 1/V V² supply voltage V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by reducing the load voltage. cooling the armature. increasing the excitation. increasing the input to the prime mover. reducing the load voltage. cooling the armature. increasing the excitation. increasing the input to the prime mover. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A slip ring Induction motor runs at 290 rpm at full load, when connected to 50 Hz supply. Determine the number of poles and slip. P = 50, s = 4.43 %. P = 20, s = 3.33 %. P = 60, s = 0.96 %. P = 40, s = 5.79 %. P = 50, s = 4.43 %. P = 20, s = 3.33 %. P = 60, s = 0.96 %. P = 40, s = 5.79 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 5 KVA transformer has a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms while that of secondary winding is 0.5+j0.8 ohms. The impedance of transformer when referred to primary will be 3.05+j5.08 ohms 8+j13 ohms 3.5+j5.8 ohms 53+j85 ohms 3.05+j5.08 ohms 8+j13 ohms 3.5+j5.8 ohms 53+j85 ohms ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS