| 1 |
The condition for the wheatstone bridge to be balanced is given by |
- A.
- B.
- C.
- D. None of above
|
| 2 |
Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained? |
- A. 3 RΩ
- B. 2R /4Ω
- C. R/3Ω
- D. 2R /3Ω
|
| 3 |
The drift velocity is of order: |
- A. 10<sup>-13</sup>m/s
- B. 10<sup>3</sup> m/s
- C. 10<sup>-3</sup>m/s
- D. 10<sup>-4</sup>m/s
|
| 4 |
When a wire of length 'l' and resistance R is cut into two equal parts then resistivity of each part. |
- A. is doubled
- B. Remains the same
- C. Is halved
- D. Is one fourth
|
| 5 |
Heat energy is converted into electrical energy. |
- A. Solar cells
- B. thermocouples
- C. Electric generators
- D. None of above
|
| 6 |
When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows |
- A. 0.20 C
- B. 2.5 C
- C. 5.0 C
- D. 10.0 C
|
| 7 |
Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is: |
- A. 3Ω
- B. 4Ω
- C. 4.5Ω
- D. 5Ω
|
| 8 |
The unit of resistance is: |
- A. Ω
- B. Ωm
- C. Ω<sup>-1</sup>m<sup>-1</sup>
- D. Ωm<sup>-1</sup>
|
| 9 |
A substance having the negative temperature co efficient of resistivity out of the following is. |
- A. Carbon
- B. Iron
- C. Tungsten
- D. Gold
|
| 10 |
The powers of two electric bulbs are 100w and 200w. Which are connected to power supply of 220 V. The ratio of resistance of their filament will be: |
- A. 1<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">:2</span>
- B. 2<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">:1</span>
- C. 1<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">:3</span>
- D. 4<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">:3</span>
|