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  3. A Piece Of Wire Of Resistance R Is Cut Into Five Equal Parts These Parts Are Then Connected In Parallel If The Equivalent Resistance Of This Combination Is R Then The Ratio R R Is
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A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R?, then the ratio R/R? is: (a) 1/25 (b) 1/5 (c) 5 (d) 25

Resistance is proportional to the length of wire and inversely proportional to the area of cross-section. IF length is 1/5th, then Resistance is also 1/5 th of the original value.

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