Question

A piece of wire of Resistance 20 ohm
is drawn out that its length
is increased twice its orginal length
calculate Resistance of wire on the
new Situation?



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Answer 1

Good question..............

Answer 2

hope it helps....

Explanation:

as R = resistivity * L / A

so, on stretching the wire length doubles but area gets halfed

so, new resistance will be 4 times the original one

new R = 80 ohn