a piece of wire of resistance R is cut into 5 equal parts an are connected in parallel. if equivalent resistance of this combination is R', then find the ratio R/R'
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Explanation:
since resistance is proportional to its length, the resistance of each wire will have a resistance of R/5.
we know in parallel combination, the equivalent resistance R' is determined by
(1/R') =(1/R/5)+(1/R/5)+(1/R/5)+(1/R/5)+(1/R/5)
R' = R/25
Hence R/R' = (R)/(R/25) = 25
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