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
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 series field of a short-shunt D.C. generator is excited by
A external current
B armature current
C shunt current
D load current
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
A VR > VC
B VC > VR
C VR = VC
D VR and VC = 0
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
The signal generator generally used in the laboratories is ___________ oscillator
A Wien-bridge
B Hartely
C Crystal
D Phase shift
A _______ is used to measure the stator % winding temperature of the generator.
A thermocouple
B pyrometer
C resistance thermometer
D thermometer

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