Question

A bimetallic strip is made up of metals M1 and M2 .On heating through the same temperature M1 expands more than M2. When the strip is cooled, it will *
(A) bend towards M1
(B) bend towards M2
(C) not bend at all
(D) direction of bending cannot be predicted

Answer 1

Answer:

Solution : On cooling though the same temperature, M1 contracts more than M2. hence, thermal expansion of first metal is higher than that of 2nd metal. we know, strip will bend with the metal of greater coefficient of thermal expansion on outer side i.e., convex side.

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