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The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?
Related MCQs
A D.C. generator can be considered as__________?
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Number of tappings for each equalizer ring is equal to__________?
In D.C. generators, lap winding is used for__________?
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The rapid wear of brushes takes place due to__________?
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Compensating windings are used in D.C. generators__________?
The following constitute short-circuit in the armature winding.
The number of brushes in a commutator depends on__________?
Magnetic field in a D.C. generator is produced by__________?
To avoid formation of grooves in the commutator of a D.C. machine?
The demagnetising component of armature reaction in a D.C. generator__________?
A cumulatively compounded long shunt generator when operating as a motor would be__________?
Armature coil is short circuited by brushes when it lies__________?
Which of the following statement about D.C. generators is false ?
To achieve sparkless commutation brushes of a D.C. generator are rockedm ahead so as to bring them?
A D.C. welding generator has__________?
In a D.C. generator the critical resistance refers to the resistance of__________?
The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be__________?
In the case of lap winding resultant pitch is__________?
The function of pole shoes in the case of D.C. machine is__________?
Flashing the field of D.C. generator means:__________?
For a D.C. machines laboratory following type of D.C. supply will be suitable__________?
In case of D.C. machine winding, number of commutator segments is equal to__________?
Welding generator will have__________?
Equilizer rings are required in case armature is__________?
Eddy currents are induced in the pole shoes of a D.C. machine due to__________?
D.C. generators are connected to the busbars or disconnected from them only under the floating condition__________?
Armature reaction of an unsaturated D.C. machine is__________?
If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be__________?
In D.C. generators, the brushes on commutator remain in contact with conductors which__________?
The insulating material used between the commutator segments is normally__________?
The material for commutator brushes is generally__________?
In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be__________?
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by__________?
If a D.C. generator fails to build up the probable cause could not be__________?
Brushes of D.C. machines are made of_________?
In D.C. generators, current to the external circuit from armature is given through__________?
Iron losses in a D.C. machine are independent of variations in__________?
Iron losses in a D.C. machine are independent of variations in__________?
The armature of D.C. generator is laminated to__________?
Laminations of core are generally made of__________?
Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
The commutator segments are connected to the armature conductors by means of__________?
The resistance of armature winding depends on
The field coils of D.C. generator are usually made of__________?
In a commutator__________?
According to Fleming’s right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of__________?
While applying Fleming’s right-hand rule to And the direction of induced e.m.f., the thumb points towards__________?
The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?
A. E/2
B. 2E
C. slightly less than E
D. E
Correct Answer:
2E
✔
Last Updated:
July 05, 2018