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To increase the length of an electric st...

To increase the length of an electric string of radius 3.5 mm by `1/20` the of its initial length, within its elastic limit, a 10N force is required, Calculate the Young's modulus for the material of the string.

Text Solution

Verified by Experts

We know that , `Y=(FL)/(pir^2l)`
Here, `F=10N,l=1/20Land r=3.5mm=0.0035m.`
`thereforeY=(10timesL)/(3.14times(0.0035)^2times1/20)=5.2 times 10^6 N.m^-2`
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