Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 100 Hz 50 Hz 25 Hz 0 Hz 100 Hz 50 Hz 25 Hz 0 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is DC. DC of slip frequency. AC of supply frequency. A modulated supply frequency AC voltage with slip frequency envelop. DC. DC of slip frequency. AC of supply frequency. A modulated supply frequency AC voltage with slip frequency envelop. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? Zero None of these Synchronous speed Slip speed Zero None of these Synchronous speed Slip speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 1, 3 1, 4 2, 4 2, 3 1, 3 1, 4 2, 4 2, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? both A and B K × input power None of these (1-K) × input power both A and B K × input power None of these (1-K) × input power ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tappings of a transformer are provided at the neutral side end of hv side at the middle of hv side at the phase end of hv side at the phase end of lv side at the neutral side end of hv side at the middle of hv side at the phase end of hv side at the phase end of lv side ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS