| 1 |
Electric current produces magnetic field, was suggested by. |
- A. Faraday
- B. Oersted
- C. Henry
- D. Lenz
|
| 2 |
Mutual induction play role in. |
- A. Generator
- B. D.C. motor
- C. Galvanometer
- D. Transformer
|
| 3 |
The induced emf in a coil is proportional to: |
- A. Magnetic flux through the coil
- B. Rate of change of Magnetic flux through the coil
- C. Area of the coil
- D. Product of magnetic flux flux and area of the coil
|
| 4 |
Unit of self inductance is |
- A. Weber
- B. Tesla
- C. Henry
- D. Farad
|
| 5 |
A.C is converted into D.C by |
- A. Dynamo
- B. Rectifier
- C. Motor
- D. Transformer
|
| 6 |
The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be: |
- A. Antoclockwise
- B. Clockwise
- C. First Clockwise and then Antoclockwise
- D. First anticlockwise and then Clockwise
|
| 7 |
Lenz's law presented in |
- A. 1834
- B. 1934
- C. 1826
- D. 1836
|
| 8 |
The negative sign with induced emf in Faraday's law is in accordance with |
- A. Lenz's law
- B. Amperes law
- C. Boyle's law
- D. Gauss law
|
| 9 |
Energy stored in inductor is. |
- A. 1/2 L I<sup>2</sup>
- B. 1/2 LI
- C. 1/2 L2I
- D. 1/2 L2I2
|
| 10 |
By winding the coil around a less magnetic core, self induction. |
- A. Will increase
- B. Will decrease
- C. Remain same
- D. First increase then decrease
|
