question_answer

When a bimetallic strip is heated, it                [CBSE PMT 1990]

A)            Does not bend at all

B)            Gets twisted in the form of an helix

C)            Bend in the form of an arc with the more expandable metal outside

D)            Bends in the form of an arc with the more expandable metal inside

Correct Answer: C

Solution :

                   A bimetallic strip on being heated bends in the form of an arc with more expandable metal (A) outside (as shown) correct.