• # question_answer A bimetallic strip is made of two strips A and B having coefficient of linear expansion as${{\alpha }_{A}}$and da. If${{\alpha }_{A}}>{{\alpha }_{B}},$ which one of the following describes the behaviour of the metallic strip when heated? A)  Strip will bend only when $\frac{{{\alpha }_{A}}+{{\alpha }_{B}}}{2}>({{\alpha }_{A}}-{{\alpha }_{B}})$ B)  Strip will bend but will not elongate C)  Strip will bend with metal A as the outer side D)  Strip will bend with metal B as The outer side

As${{\alpha }_{A}}$is more than${{\alpha }_{B}}$so the length of metal A after rise in temperature will be more than that of metal B. The bimetallic strip will bend in such a manner that metal A will fall on the outer side and B will lie on the inner side of the bent strip.