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Resistivity

The length of...

Question

The length of a conductor is doubled and its radius is halved, its specific resistance is

A

halved

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B

doubled

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C

quadrupled

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D

unchanged

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Solution

The correct option is D unchanged
Specific resistance ( or resistivity ) is an intrinsic property of a material i.e. it depends only on the nature of material but not on the dimensions of the conductor. Thus specific resistance remains the same even if the length of the conductor is doubled and its radius is halved.

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