| 1 |
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
|
| 2 |
For accurate measurement of current through a circuit, the resistance of ammeter should be |
- A. Very small
- B. Very high
- C. Neither small nor high
- D. None of the above
|
| 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 |
A battery is used in |
- A. ohmmeter
- B. Ammeter
- C. Galvanometer
- D. Voltemeter
|
| 5 |
To convert a galvanometer into an ammeter, we connect with it a |
- A. Shunt resistance
- B. Low value parallel
- C. Low value by pass resistor
- D. All of above
|
| 6 |
A positive charge is moving towards an observer, The direction of magnetic induction will be. |
- A. Toward right
- B. Anti clockwise
- C. Clockwise
- D. Toward left
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| 7 |
In order to increase sensitivity of galvanometer the value of C may be |
- A. Increase
- B. Decrease
- C. Neither increase nor decrease
- D. Remain same
|
| 8 |
The effective way to increase the sensitivity of moving coil galvanometer is. |
- A. Increase the area of coil
- B. Increase the number of turn
- C. Increase the magnetic field
- D. Increase the value of constant C
|
| 9 |
If an electron is prijected in a magnetic field with velocity V, it will experience a force |
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| 10 |
The galvanometer can be made sensitive by making the factor BAN/C |
- A. Large
- B. Small
- C. Constant
- D. Zero
|