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Calculate the work done in stretching the wire of length=2 m and the values of stress and strain are 16 N/m^2 and 24.

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Calculate the work done in stretching the wire of length=2 m and the values of stress and strain are 16 N/m^2 and 24.

(a) 1566 J

(b) 1644 J

(c) 1522 J

(d) 1536 J

The question was posed to me by my college director while I was bunking the class.

Origin of the question is Motors Rating and Heating topic in division Rating and Heating of Motors of Electric Drives

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Correct choice is (d) 1536 J

Easiest explanation: The work done in stretching a wire is .5×Stress×Strain×Volume. The value of the work done is .5×8×16×24=1536 J. The volume of wire is 2×2×2=8 m^3.

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