If a wire of resistance 25Omega is unifo...

If a wire of resistance `25Omega` is uniformly stretched until its length becomes three times its original length then its new resistance is

`100Omega`

`225Omega`

`2.25Omega`

`122.5Omega`

Text Solution

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The correct Answer is:

`R_(2)=n^(2)R_(1)=3^(2)xx 25 = 225 Omega`

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