Let us consider a copper wire having radius r and length...

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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: Option D

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