Keeping the length of the conductor constant, if the radius of the conductor is doubled, then its resistance becomes

Double

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Quadrupled

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Half

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Four times less

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Solution

The correct option is C Four times less
When the radius is doubled ,its area becomes four times .
We know that Resistance is inversely proportional to A.
So resistance will become ${\frac{1}{4}}^{t h}$

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