| 1 |
5 A of current flows through a conductor in 2 minutes, charge in the wire is. |
- A. 500 C
- B. 600 C
- C. 400 C
- D. 10 C
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| 2 |
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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| 3 |
The resistivity of two wires is<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ<sub>1</sub> and</span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ<sub>2</sub> which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:</span> |
- A. (<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ<sub>1</sub> +</span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ<sub>2</sub></span>)
- B. 1/<span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub>1</sub>+ 1/</span><span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub>2</sub></span>
- C. <span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub style="">1</sub>+</span><span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub style="">2</sub></span>/2
- D. <span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub>1/</sub></span><span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">ρ<sub>2</sub></span>
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| 4 |
The current through a resistance of 100 Ohm when connecting across a source of 220 V is. |
- A. 22000 A
- B. 22 A
- C. 2.2 A
- D. 0.45 A
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| 5 |
Magnetic effect of current is used in. |
- A. Toaster
- B. Electric iron
- C. Electric motor
- D. D.C. Battery
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| 6 |
Resistance tolerance for gold colour is. |
- A. 50%
- B. 30%
- C. 20%
- D. 5%
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| 7 |
What is the resistance of carbon resistor which has band brown black brown. |
- A. 100 Ohm
- B. 1000 Ohm
- C. 10 Ohm
- D. 1.0 Ohm
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| 8 |
mho -m-1 is the unit of. |
- A. Resistance
- B. Resistivity
- C. Conductance
- D. Conductivity
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| 9 |
The heat produced by passage of current. |
- A. H=I<sup>2</sup>Rt
- B. H=IR2T
- C. H=I/Rt
- D. H=I<sup>2</sup>/Rt
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| 10 |
A certain wire has a resistance R, the resistivity of an other wire of an identical material with the first, except for twice its diameter is. |
- A. 1/4 R
- B. 4R
- C. 2R
- D. Same as R
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