| 1 |
In self induction A coil is connected in__________ with battery and a rheostat. |
- A. Parallel
- B. Series
- C. Both A and B
- D. None of above
|
| 2 |
Mutual induction play role in. |
- A. Generator
- B. D.C. motor
- C. Galvanometer
- D. Transformer
|
| 3 |
|
- A. Lenz's law
- B. Faraday's law
- C. Ampere's law
- D. None of these
|
| 4 |
A.C is converted into D.C by |
- A. Dynamo
- B. Rectifier
- C. Motor
- D. Transformer
|
| 5 |
Energy stored in an inductor is: |
- A. 1/2L<sup>2</sup>I
- B. 1/2L<sup>2</sup>/I
- C. <sub>1/2LI</sub><sup>2</sup>
- D. 1/2LI
|
| 6 |
When back emf in motor is zero, it draws. |
- A. Zero current
- B. Minimum current
- C. Maximum current
- D. Steady current
|
| 7 |
Self induction does not depend on |
- A. Number of turns of the coil
- B. Area of cross section of the core
- C. Nature of material of the core
- D. Current through inductor
|
| 8 |
When motor is just started, back emf is almost. |
- A. Maximum
- B. Zero
- C. Minimum
- D. Infinite
|
| 9 |
The mutual inductance of the coils depends upon. |
- A. Stiffness of the coils
- B. Density of coils
- C. Material of coils
- D. Geometry of the coils
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| 10 |
When the back emf is zero, its draws. |
- A. Zero current
- B. Minimum current
- C. Maximum current
- D. Steady current
|