| 1 |
One henry is equal to |
- A. 1 ohm x 1 sec
- B. 1 ohm x 1 hertz
- C. 1 ohm x 1 metre
- D. All of above
|
| 2 |
SI unit of hennery which is. |
- A. VSA-1
- B. VS-1 A
- C. VS-1A-1
- D. VSA
|
| 3 |
Mutual induction play role in. |
- A. Generator
- B. D.C. motor
- C. Galvanometer
- D. Transformer
|
| 4 |
Electromagnetic induction is exactly according to law of: |
- A. Momentum
- B. Charge
- C. Energy
- D. Mass
|
| 5 |
Efficiency of transformer does not affected by |
- A. Input voltage
- B. Core of transformer
- C. Insulation between sheet
- D. Resistance of coils
|
| 6 |
The induction can be increased by winding the wire around a core made of. |
- A. Copper
- B. Silicon
- C. Iron
- D. Aluminum
|
| 7 |
The motional emf developed in a conduction depends upon. |
- A. Length
- B. Orientation
- C. Magnetic field
- D. All of the above
|
| 8 |
In A.C. generator , when plane of coil is perpendicular to magnetic field, then output of generator is. |
- A. NwAB
- B. 2pi f
- C. Maximum
- D. Zero
|
| 9 |
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| 10 |
A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is. |
- A. 0.1 J
- B. 10 J
- C. 100 J
- D. 1000 J
|