Electrical Machines Open circuit test on transformer gives both 1and 2 hysteresis loss eddy current loss copper loss both 1and 2 hysteresis loss eddy current loss copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 3000 rpm. 4000 rpm. 1500 rpm. 3600 rpm. 3000 rpm. 4000 rpm. 1500 rpm. 3600 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift decreases in both generators and the motors with load. increases in both the generators and the motors with load. increases in generators but decreases in motor with load. decreases in generators and increases in motor with load. decreases in both generators and the motors with load. increases in both the generators and the motors with load. increases in generators but decreases in motor with load. decreases in generators and increases in motor with load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz 1-phase induction motor is running at 1470 rpm. Find the forward and backward slips? 0.02, 1.98 0.02, 0.98 0.04, 0.96 0.04, 1.96 0.02, 1.98 0.02, 0.98 0.04, 0.96 0.04, 1.96 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the armature reaction results in magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of leading & magnetization of trailing pole tip. demagnetization of centers of poles. magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of leading & magnetization of trailing pole tip. demagnetization of centers of poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause all of these. less heating of the rotor. negative sequence current. less heating of the rotor. all of these. less heating of the rotor. negative sequence current. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
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