Electrical Machines In a 3 - Φ induction motor power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. none of them. power factor at starting in the same as that while running. power factor at starting is high as compared to that while running. power factor at starting is low as compared to that while running. none of them. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which one of the following statement is correct ? In an induction motor if the air gap is increased then its efficiency will improve its speed will reduce its power factor will reduce its speed will increase its efficiency will improve its speed will reduce its power factor will reduce its speed will increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The self induced emf in the coil undergoing commutation is called the dynamically induced voltage. statically induced voltage. reactance voltage. None of these dynamically induced voltage. statically induced voltage. reactance voltage. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the necessity of copper brushes in a dc motors? To increase the flux cutting by the rotor. To convert alternating supply current to direct current. None of these. To absorb the mechanical shocks produced during running condition. To increase the flux cutting by the rotor. To convert alternating supply current to direct current. None of these. To absorb the mechanical shocks produced during running condition. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field system of an alternator is usually excited 250 / 250 V DC. 230 V AC. 110 / 220 V AC. 3 - Φ, 50 Hz and 400 V. 250 / 250 V DC. 230 V AC. 110 / 220 V AC. 3 - Φ, 50 Hz and 400 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when input power factor is unity. load angle is equal to internal angle θ. load angle is 45°. load angle is 0°. input power factor is unity. load angle is equal to internal angle θ. load angle is 45°. load angle is 0°. ANSWER DOWNLOAD EXAMIANS APP
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