Question

A wire of resistivity p is stretch to double it's length how does it affect
A- resistance
B- resistivity

Answer 1

Heya mate, Here is ur answer

R= P l/A

Now l is doubled

So, l=2l

R2= p 2l/A

R2=2×p l/A

R2 =2 R

1) So, the resistance will increase by two times.

2) Resistivity of a conductor is a constant value. There will not be any effect on the resistivity of the conductor even if the length or width is changed.

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@Laughterqueen

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