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

(36)