| 1. | Three resistors of 1 ohm, 2 ft and 3 ohm are connected in parallel. The combined resistance of the three resistors should be ? | |
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between 1 ohm and 3 ohm
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equal to 2 ohm
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greater than 3 ohm
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less than 1 ohm
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Report Question| 2. | If the current I through a resistor is increased by 100 % (assume that temperature remains unchanged), the increase in power dissipated will be ? | |
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200%
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300 %
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100%
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400 %
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| 3. | Electric potential is a ? | |
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neither scalar nor vector
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scalar quantity
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vector quantity
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sometimes scalar and sometimes vector
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| 4. | Heat produced in a current carrying wire in 5s is 60J. The same current is passed through another wire of half the resistance. The heat produced in 5s will be ? | |
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120 J
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15 J
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60 J
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30 J
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| 5. | Electrical resistivity of a given metallic wire depends upon ? | |
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Its thickness
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Nature of the material
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Its shape
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Its length
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| 6. | Which of the following statement is or are correct ? | |
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The simplest way to maintain a potential difference between the two ends of a conductor is to connect the conductor between the terminals of a cell or battery.
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The electric current is a flow of electrons in a metal wire or conductor when a battery is applied across its ends.
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Circuit is a continuous conducting path consisting of wires and switch between two terminals of a cell along which an electric current flow.
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All the above
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| 7. | When electric current is passed, electrons move from ? | |
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against the direction of the current
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in the direction of the current
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low potential to high potential
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high potential to low potential
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| 8. | The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use ? | |
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48.4 ohm
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400 ohm
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48 ohm
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484 ohm
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| 9. | Unit of electric power may also be expressed as ? | |
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joule-second
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watt-second
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volt-ampere
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kilowatt-hour
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| 10. | Electrical resistivity of any given metallic wire depends upon ? | |
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nature of the material
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its length
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its shape
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its thickness
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