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How does the resistance of a wire depend...

How does the resistance of a wire depend on its radius? Explain your answer.

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ICSE-CURRENT ELECTRICITY-EXERCISE-8(A)
  1. Fig. shows I-V curves for two resistors. Identify the ohmic and non-oh...

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  2. Draw a V-I graph for a conductor at two different temperatures. What c...

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  3. How does the resistance of a wire depend on its radius? Explain your a...

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  4. Two copper wires are of the same length, but one is thicker than the o...

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  5. How does the resistance of a wire depend on its length ? Give a reason...

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  6. How does the resistivity of a consuctor depend upon temperature and el...

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  7. Two wires, one of copper and the other of iron, are of the same length...

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  8. Name three factors on which resistance of a given wire depends and sta...

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  9. Define the term "specific resistance and state its S.I. unit.

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  10. Write an expression connecting the resistance of a wire and specific r...

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  11. State the order of specific resistance of a metal,

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  12. State the order of specific resistance of a semiconductor

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  13. State the order of specific resistance of an insulator

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  14. (a) Name two factors on which the specific resistance of a wire depend...

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  15. Name a substance of which the specific resistance remains almost uncha...

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  16. How does the specific resistance of a semi-conductor change with the i...

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  17. How does (a) resistance, and (b) specific resistance of a wire depend ...

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  18. Name the material used for making connection wires. Give a reason for ...

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  19. Why should a connection wire be thick ?

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  20. Name a material which is used for making a standard resistor. Give a r...

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