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
How many flowers are there if all of them are roses except two, all of them are tulips except two and all of them are daisies except two?
A 3
B 6
C 9
D 10
How many flowers are there if all of them are roses except two , all of them are tulips except two and all of them are daisies except two?
A 3
B 6
C 9
D 10
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens
A This will make armature to take heavy current, possibly burning it
B This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
C Nothing will happen to motor
D Motor will come to stop
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens
A Nothing will happen to the motor
B This will make armature to take heavy current, possibly burning it
C This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
D Motor will run at very slow speed
Which of the following generator will have negligible terminal voltage while running on no-load?
A Series generator
B Shunt generator
C Compound generator
D Separately excited generator
In over compounded generator, full load terminal voltage is
A Almost zero
B Less than no load terminal voltage
C More than no load terminal voltage
D Equal to no-load terminal voltage
In a level compounded D.C. generator, full load terminal voltage is
A Negligibly low
B Equal to no-load terminal voltage
C More than no-load terminal voltage
D Less than no-load terminal voltage
Rain drops falling through atmospheric air attain limited terminal velocity, because of
A Upward thrust due to air
B Viscous force exerted by air
C Surface tension effects of water
D Force of gravity
In a shunt generator the voltage build up is generally restricted by
A speed limitation
B armature heating
C insulation restrictions
D saturation of iron

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