Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 50 Hz 5 Hz 0 Hz 1 Hz 50 Hz 5 Hz 0 Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC series motor is best suited for electric traction as It develops high starting torque. It is cheaper in cost. It runs at very high speed at light load. It consume less power. It develops high starting torque. It is cheaper in cost. It runs at very high speed at light load. It consume less power. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is 600 rpm. 500 rpm. 3600 rpm. 3000 rpm. 600 rpm. 500 rpm. 3600 rpm. 3000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine makes an angle of 90° with the main pole axis. is in the same direction as the main poles. is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in the same direction as the main poles. is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed reduce slightly. increase proportional. remains constant. increased slightly. reduce slightly. increase proportional. remains constant. increased slightly. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutators in DC machines have a role of which converts none of these. AC to DC. high voltage DC to low voltage DC. Both AC to DC and DC to AC. none of these. AC to DC. high voltage DC to low voltage DC. Both AC to DC and DC to AC. ANSWER DOWNLOAD EXAMIANS APP
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