• Subject:

...

• Topic:

...

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 $\alpha$. If the temperature of the rod is increased by $∆t°C$, the force exerted by the rod on the supports is

(a)                           (b)

(c)                           (d)