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The work done in twisting a steel wire of length 25 cm and radius 2mm through 45°will be (η = 8 x 10^10N/m^2 )

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The work done in twisting a steel wire of length 25 cm and radius 2mm through 45°will be (η = 8 x 1010N/m2 )

(a)  2.48 J 

(b)  3.1 J 

(c)  15.47 J 

(d)  18.79 J

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Correct option  (a) 2.48 J

Explanation:

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