103. A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the rod is increased by
A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the rod is increased by Δt°C the force exerted by the rod on the supports is
(a) Y AL Δt (b) Y Aα Δt
(c) (YLα Δt) / A (d) Yα A L Δt
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a