Question

`\bigstar` A uniform resistance wire is stretched till it's length becomes four times.What happens to the resistance ?

*Plagiarised / Irrelevant answers will be reported!​

Answer 1

if a uniform resistance wire is stretched till it's length becomes four times the the resistance of wire multiples by sixteen times as resistance is directly proportional to the

length of wire.

hope it helps.

stay safe healthy and happy

Answer 2

we have:

At unit length

Resistance [R]=
`(pL)/(A)`.....i

where

p: resistivity

L:length

A:area

when

length is strength 4 times

length will be 4L

Now

new equation becomes

Resistance[R] =
`(p4L)/(A)`=4
`(pL)/(A)`=4R

so

when A uniform resistance wire is stretched till it's length becomes four times. the resistance increases by four times of its original resistance.