| 1 |
The brightness of the spot of CRO screen is controlled by. |
- A. Anode
- B. Cathode
- C. Grid
- D. Deflecting plates
|
| 2 |
In order to measure potential difference voltmeter is always connected in. |
- A. Series
- B. Parallel
- C. Both a and b
- D. Neither in series nor in parallel
|
| 3 |
The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by |
|
| 4 |
The force on a charge particle moving parallel to magnetic field is: |
- A. Maximum
- B. Minimum
- C. Zero
- D. None of these
|
| 5 |
The SI unit of magnetic permeability is. |
- A. WbA-1m-1
- B. Wbm-2
- C. WbmA-1
- D. WbAm-1
|
| 6 |
Magnetic flux density is measured in |
- A. Weber
- B. Weber/m2
- C. Tesla -m
- D. Gauss
|
| 7 |
NIBA = |
- A. cθ
- B. θ/c
- C. c<sup>2</sup>θ
- D. c<sup>2</sup>/θ
|
| 8 |
The Grid 'G' in cathode ray oscilloscope. |
- A. Accelerate as well as focus electron beam
- B. Control no. of electrons beam
- C. Is at - Ve potential with respect to cathode.
- D. Both d and b
|
| 9 |
If the length and number of turns of a solenoid are doubled strength of magnetic field with. |
- A. Be doubled
- B. Become half
- C. Not change
- D. Be four time
|
| 10 |
Ampere's law is applicable to: |
- A. Circular path
- B. Rectangular path
- C. To any closed path
- D. Nonwe of these
|
