Question

how will the resistivity of a conductor change when its length is tripled by streching it

Answer 1

Resistivity of a conductor such as wire will increase by nine times when it is stretched by three times.

It is directly proportional to the length and inversely proportional to diameter.

When the conductor is stretched, the diameter decreases and the length increase increasing resistivity.

So the resistivity will also triple.

Answer 2

Explanation:

Resistivity of a conductor is defined as the measure of its resisting power to the flow of electric current. It is a inner property of a material. It can be calculated by using the below formula

$\rho=R\dfrac{A}{L}$

A is area of cross section

L is length of conductor

If the length of a conductor is tripled by stretching it, its resistivity remains the same.

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Resistivity

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