| 1 |
Electric power: |
- A. Vx1
- B. V<sup>2</sup>x1
- C. V/1
- D. V/1<sup>2</sup>
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| 2 |
e.m.f is the conversion of --------------- energy into electrical energy |
- A. Chemical
- B. Solar
- C. Light
- D. None of these
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| 3 |
Specific resistance of a material depends upon. |
- A. Length
- B. Area
- C. Temperature
- D. Both A and B
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| 4 |
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>
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| 5 |
A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be: |
- A. Doubled
- B. Halved
- C. Remain the same
- D. One fourth
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| 6 |
The head produced by the passage of current through a resistor is. |
- A. H= I<sup>2</sup>Rt
- B. H = IR<sup>2</sup>t
- C. H = 1/Rt
- D. H = I<sup>2</sup>/Rt
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| 7 |
A substance having the negative temperature co efficient of resistivity out of the following is. |
- A. Carbon
- B. Iron
- C. Tungsten
- D. Gold
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| 8 |
Tolerance of "Gold" band. |
- A. ±10%
- B. ±5%
- C. ±15%
- D. ±20%
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| 9 |
Ampere second stands for the unit of. |
- A. Charge
- B. emf
- C. energy
- D. Power
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| 10 |
In carbon resistors, then value of Blue colour is. |
|