| 1. | The flow of current in solids is due to ? | |
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electrons
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electrons and ions
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atoms
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nucleus
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Report Question| 2. | The electrical energy required to heat a bucket of water to a certain temperature is 4kWh. If the heat losses are 20 percent, the energy input is ? | |
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2 kWh
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3.2 kWh
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6 kWh
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6 kWh
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| 3. | The draft velocity of electrons is ? | |
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very small as compared to speed of light
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equal to speed of light
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almost equal to speed of light
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greater than speed of light
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| 4. | The resistance of human body is around ? | |
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6 ohms
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25 ohms
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250 ohms
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1000 ohms
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| 5. | The substances which have a large number of free electrons and offer a low resistance are called ? | |
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insulators
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inductors
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semi-conductors
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conductors
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| 6. | Out of the following which is not a poor conductor ? | |
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Cast iron
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Copper
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Carbon
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Tungsten
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| 7. | You have to replace 1600 ? resistor in radio. You have no 1600 ? resistor but have several 1000 ? ones which you would connect ? | |
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two in parallel
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two in parallel and one in series
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three in parallel
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three in series
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