22. A wire of length L and cross-sectional area A is made of a material of Young’s modulus Y. It is stretched by an amount x. The work done is
(a) (YxA)/(2L) (b) (Yx2 A)/(L)
(c) (Yx2 A)/(2L) (d) (2Yx2 A)/(L)
Answer-c
(22)
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