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2014-08-10T20:47:48+05:30

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Resistance is proporational to length of a wire and inversely proportional to cross sectional area

Resistance of small wire pieces = R /5

When 5 equal resistors are connected in parallel : net resistance is 1/5 th of each
                 = R / 5  * 1/5  = R /25
R1/ R = 1/25

1 5 1