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Miscellaneous·2019·Easy

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 1/2 then the resistance of this wire will be

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 1/2 then the resistance of this wire will be

Options

  1. a.

    R

  2. b.

    2R

  3. c.

    R/4

  4. d.

    R/8

    Correct answer

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