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Resistance

What would be...

Question

What would be new resistance if length of conductor is doubled and thickness is halved ?

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Solution

New resistance is 8 times the old resistance. If the length is double then the resistance would increase by 8 times.
Since R=P*L/A (Resistivity constant) length becomes 2L and area becomes 1/4th.
So, almost the new resistance increase by 4 times.

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