Question

if a wire is doubled then why its length becomes half?​

Answer 1

Answer:

When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times. ... When the wire is stretched to double the length , the area of cross section gets reduced to half.

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Answer 2

Answer:

Hope ur question is If area of wire is doubled why its length becomes half.

Explanation:

It is because the volume of the wire must be constant under certain conditions.

Volume = Area x length

Area ∝ 1/length

So doubling area would reduce its length by half

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