Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/60. PN/2. PN/3000. PN/120. PN/60. PN/2. PN/3000. PN/120. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reversing the direction of rotation of split phase motors is done by interchanging the capacitor from starting winding to main winding or vice versa. reversing the terminals of main winding. reversing the terminals of starting winding. All of these interchanging the capacitor from starting winding to main winding or vice versa. reversing the terminals of main winding. reversing the terminals of starting winding. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor will become leading will remain the same None of these will become lagging will become leading will remain the same None of these will become lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following speed control of DC motor the speed obtained is below than the rated speed? Field resistance control. Armature circuit resistance control. Armature voltage control. Any of above. Field resistance control. Armature circuit resistance control. Armature voltage control. Any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above question, the output power delivered by generator G1 and G2 will be 5.7 kW, 8.7 kW. 9.3 kW, 9.3 kW. 6.3 kW, 9.3 kW. 9.6 kW, 12 kW. 5.7 kW, 8.7 kW. 9.3 kW, 9.3 kW. 6.3 kW, 9.3 kW. 9.6 kW, 12 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because there was a break in the armature circuit field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected ANSWER DOWNLOAD EXAMIANS APP
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