Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will become execessively high. increase. decrease. remain unaltered. become execessively high. increase. decrease. remain unaltered. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is zero. leading. unity. lagging. zero. leading. unity. lagging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc motors, under leading pole tips flux density will--------? decrease increase None of these either increase or decrease decrease increase None of these either increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing equalizer rings. carbon brushes. commutator with large number of segments. graphite brushes. equalizer rings. carbon brushes. commutator with large number of segments. graphite brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to too rapid reversal of current. under commutation. any of the above. over commutation. too rapid reversal of current. under commutation. any of the above. over commutation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? All of these Rotational loss Copper loss Iron loss All of these Rotational loss Copper loss Iron loss ANSWER DOWNLOAD EXAMIANS APP
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