Electrical Machines For a given torque, reducing diverter resistance of a DC series motor causes decrease in speed demanding less armature current. decrease in speed but armature current remains the same. increase in speed demanding more armature current. increase in speed but armature currnet remains the same. decrease in speed demanding less armature current. decrease in speed but armature current remains the same. increase in speed demanding more armature current. increase in speed but armature currnet remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Width of a carbon brush should be equal to the width of the 2 to 3 commutator segment. the width of the 1 to 2 commutator segment. the width more than 3 commutator segment. less than the width of commutator segment. the width of the 2 to 3 commutator segment. the width of the 1 to 2 commutator segment. the width more than 3 commutator segment. less than the width of commutator segment. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is equal to that of second transformer. less than that of second transformer. none of these. more than that of second transformer. equal to that of second transformer. less than that of second transformer. none of these. more than that of second transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? None of these GNA MNA either GNA or MNA None of these GNA MNA either GNA or MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator, if mechanical input is increased with constant excitation, the load angle will decrease None of these increase either increase or decrease decrease None of these increase either increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? Rotational loss Iron loss Copper loss All of these Rotational loss Iron loss Copper loss All of these ANSWER DOWNLOAD EXAMIANS APP
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