Question

A bimetallic strip consisting of metals X and Y of equal length, is heated to temperature $T$. The shape of the bimetallic strip is deflected to form an arc as shown in the image. If $\alpha \text{and}\beta$ are the coefficients of linear expansion of metals X and Y, then

• A. $\alpha >\beta$
• B. $\beta >\alpha$
• C. $\alpha =\beta$
• D. Relation between $\alpha \text{and}\beta$ cannot be determined.

Answer 1

The correct option is A $\alpha >\beta$

From the image, it's clear that metal X has expanded more than metal Y. Hence, $\alpha >\beta$.
Option (a) is correct.