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If ‘S’ is stress and ‘Y’ is young’s modulus of material of a wire, the energy stored in the wire per unit volume is (a) S 2 /2Y (b) 2S 2 Y (c) S/2Y (d) 2Y/S 2

If ‘S’ is stress and ‘Y’ is young’s modulus of material of a wire, the energy stored in the wire per unit volume is
(a) S2/2Y
(b) 2S2Y
(c) S/2Y
(d) 2Y/S2

Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago
. (a) Energy stored per unit volume,
E = 1/2 * stress * strain
We know that,
E = 1/2 * stress * stress/Y = 1/2 .S2/Y

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