| 1 |
If a charge is at rest in a magnetic field then force on charge is |
- A. Zero
- B. Double
- C. One fourth
- D. Four times
|
| 2 |
Force on a charged particle is zero when projected at angle with magnetic field. |
- A. 0 <sup>o</sup>
- B. 90<sup>o</sup>
- C. 180<sup>o</sup>
- D. 270<sup>o</sup>
|
| 3 |
Sensitivity of a galvanometer can be increased by |
- A. Decreasing the value of torsional couple
- B. Decreasing number of turns
- C. Decreasing area of plane of coil
- D. Decreasing magnetic field
|
| 4 |
Useful device to measure resistance, current and voltage is an electronic instrument called. |
- A. Volt meter
- B. Ammeter
- C. Ohmmeter
- D. Digital Multimeter
|
| 5 |
An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected. |
- A. upward
- B. To ward right
- C. Down ward
- D. Toward left
|
| 6 |
A Current flowing towards the reader is denoted by. |
- A. Cross
- B. a bracket
- C. A dot
- D. Positive sign
|
| 7 |
The torque in the coil can be increased by increasing: |
- A. No. of turns
- B. Current and magnetic field
- C. Area of coil
- D. All of the above
|
| 8 |
A soft iron cylinder is placed inside coil galvanometer to: |
- A. Make field circular and strong
- B. Make field radial and weak
- C. Make field radial and strong
- D. All of above
|
| 9 |
Lorentz force means the force acting on a particle, which is |
- A. Magnetic force only
- B. Electric force only
- C. Sum of electric and magnetic force
- D. None of these
|
| 10 |
The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is. |
- A. ms-2
- B. ms
- C. ms<sup>-1</sup>
- D. m-1s-1
|