For a popular class demonstration,your physics instructor uniformly heats a bimetallic strip that is rigidly clamped vertically downward.As a result,the bimetallic strip bends to the right.Now your instructor uniformly cools the bimetallic strip by immersing it in liquid nitrogen.He asks you to predict in which direction the bimetallic strip will bend this time.
A)to the right
B)to the left

Question

Quizplus · Accepted Answer

When the bimetallic strip is heated, it bends towards the metal with the lower coefficient of linear expansion. When it is cooled, it bends towards the metal with the higher coefficient of linear expansion. Therefore, since the bimetallic strip was bending towards the right when heated, it will now bend towards the left when cooled.

For a Popular Class Demonstration,your Physics Instructor Uniformly Heats a Bimetallic