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A uniform copper wire of resistance R is...

A uniform copper wire of resistance R is halved and the two parts are connected in parallel .IF now the equivalent resistance is R' then what is the ratio of R to R'?

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Knowledge Check

  • A uniform wire of resistance R ohm is divided into ten equal parts and all of them are connected in parallel. The net resistance is :

    A
    0.01R
    B
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  • A uniform metal wire of resistance R is stretched to twice its length. Now this wire is halved, and the two halves are connected in parallel. The equivalent resistance is

    A
    `R/2`
    B
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    C
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    D
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