1. A
piece of wire of resistance R is cut into 5 equal parts. These are then
connected in parallel to form a combination R1.What will be the ratio of R1/R
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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
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
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