Science, asked by nayakaparajia51, 11 months ago

A wire is stretched to increase its length by 5%.Calculate the percentage change in resistance

Answers

Answered by abhishekmaurya198
5

Answer:

It is given l'=l + 5% of l =l +5/100 l = l(1+5/100)

Therefore A'=A/(1+5/100)

R'=pl'/A' =[pl×(1+5/100)]/[A/(1+5/100)]

=[pl×(1+5/100)^2] /A

=R×(1+10/100)

Percentage increase in resistance =R'-R/R×100 =10%

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