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This question belongs to Physics GK Chapter Wise Electricity And Magnetism

Electricity and Magnetism

?

Let us consider a copper wire having radius r and length l. Let its resistance be R. If the radius of another copper wire is 2r and the length is $$\frac{l}{2}$$, then the resistance of this wire will be

A) R B) 2R C) $$\frac{R}{4}$$ D) $$\frac{R}{8}$$

Answer & Solution

Correct Answer: Option D

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