Question

the length of the wire is doubled by pulling it.find the new resistance?

Answer 1

With the increase in length of the wire, the thickness reduces (due to stretching) and thus, there's less space for current to flow and therefore, the resistance is doubled.
Hence, we say that when the length or the width of the wire is doubled, the resistance gets doubled.

Answer 2

Answer:

With the increase in length of the wire, the thickness reduces (due to stretching) and thus, there's less space for current to flow and therefore, the resistance is doubled.

Hence, we say that when the length or the width of the wire is doubled, the resistance gets doubled.

Explanation:

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