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How does the resistance of a wire depend...

How does the resistance of a wire depend on its length ?

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The resistance of wire, `R prop l` where `l` is the length of the wire.
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PRADEEP-ELECTRICITY-(Additional)Very Short Answer
  1. What happens it the pd across a resistance is doubled ?

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  2. How does the resistance of a wire depend upon its radius ?

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  3. How does the resistance of a wire depend on its length ?

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  4. How does the resistance of a metallic wire depend on its temperature ?

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  5. Two wires are of the same length, same radius, but one of them is of t...

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  6. Find the potential difference required to pass a current of 0.2 A in a...

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  7. An electric bulbs draws 1.2 A current at 6.0 V. Find the resistance of...

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  8. Which will have a higher resistivity : a conductor or an insulator ?

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  9. Two wires of same material and same length have radii r1 and r2 respec...

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  10. Name a substance whose resistance decrease with temperature.

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  11. Name a substance whose resistance almost remains unchanged by increase...

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  12. Distinguish between kilowatt and kilowatt hour.

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  13. Name two special characteristics of a heater coil.

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  14. A 60 W bulb carries a current 0.5 A. Find the charge that passes throu...

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  15. Calculate the current through a lamp of 25 W operating at 200 V.

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  16. If r1,r2 and r3 are three resistors connected in series in a circuit a...

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  17. Which combination of resistors is used to decrease current in a circui...

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  18. What is the pd across each resistor in a series circuit ?

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  19. The power rating of an appliance is 100 W-250 V. What does it signify ...

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  20. Why is much less heat generated in long electric cables than in the fi...

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