Related Questions

The e.m.f. generated by a shunt wound D.C. generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be
A $$\frac{{\text{E}}}{2}$$
B 2E
C Slightly less than E
D E
A separately excited generator as compared to a self-excited generator
A Is amenable to better voltage control
B Is more stable
C Has exciting current independent of load current
D Has all above features
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?
A Dummy coils
B Commutator
C Eye bolt
D Equalizer rings
The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?
A Hysteresis loss
B Field copper loss
C Armature copper loss
D Eddy current loss
In a D.C. generator the critical resistance can be increased by
A Increasing its field resistance
B Decreasing its field resistance
C Increasing its speed
D Decreasing its speed
A shunt generator can self-excite
A Only if the resistance of the field circuit is less than critical value
B Only if the resistance of the field circuit is greater than critical value
C Irrespective of the value of the resistance in the field circuit
D None of the above
A series generator can self-excite
A Only if the load current is zero
B Only if the load current is not zero
C Irrespective of the value of load current
D None of the above
The polarity of the induced voltage can be determined by using the left-hand generator rule.
A Yes
B No
An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.
A odd, even
B high, low
C low, high
D even, odd
E None of the above
Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft?
A mechanic energy
B kinetic energy
C potential energy
D elastic energy

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