1. |
If field current is decreased in a shunt dc motor, the speed of the motor
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Answer:
Option (b) |
2. |
What is the mechanical power developed by a DC series motor is maximum?
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Answer:
Option (a) |
3. |
In the Ward-Leonard system, the lower limit of the speed imposed by
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Answer:
Option (c) |
4. |
Ward-Leonard control is basically a ___________ control method.
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Answer:
Option (c) |
5. |
For very sensitive and wide speed control, the preferable control method is
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Answer:
Option (b) |
6. |
Commutator pitches of duplex and simplex lap windings are respectively
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Answer:
Option (b) |
7. |
The emf induced in the dc generator armature winding is
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Answer:
Option (a) |
8. |
Commutator in DC generator is used for
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Answer:
Option (d) |
9. |
A DC generator without commutator is a
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Answer:
Option (a) |
10. |
In DC machine yoke offers
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Answer:
Option (d) |