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Name a device that helps to maintain a p...

Name a device that helps to maintain a potential difference across a conductor.

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A battery
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OSWAAL PUBLICATION-ELECTRICITY-TOPIC-2 ( Long Answer Type Questions )
  1. What is meant by electric current ? Name and define S.I. unil In a con...

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  2. What is meant by potential difference ? State its SI unit.

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  3. Name a device that helps to maintain a potential difference across a c...

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  4. What is the lowest total resistance that can be secured by combination...

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  5. Establish a relationship to determine the equivalent resistance R of a...

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  6. Derive an expression for Joule's law of heating.

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  7. Give two examples for applications of heating effect of electric curre...

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  8. 100 J of heat is produced each second in a 4 Omega resistor. Find the ...

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  9. A wire of resistivity p is pulled to double its length. What will be i...

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  10. Draw a schematic diagram of a circuit consisting of a battery of three...

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  11. Two wires of equal length, one of copper and the other of manganin hav...

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  12. Derive an expression for the equivalent resistance of three resistors ...

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  13. Fuse of 3A, 5A and 10A are available. Calculate and select the fuse fo...

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  14. What is meant by the statement that the resistance of a wire is 1 Omeg...

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  15. Two identical resistors each of resistance 12 Omega are connected (i) ...

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  16. How is a voltmeter connected in the circuit to measure the potential d...

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  17. Explain the term : Heating effect of electric current.

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  18. Derive an expression for the heat produced by electric current and sta...

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  19. Why are electric bulbs filled with chemically inactive nitrogen or arg...

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  20. State Ohm's law. Give mathematical relation between potentW difference...

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