Question

What is a bimetallic strip? Why does a bimetallic strip of brass and iron bend on heating?

Answer 1

bimetallic strips consist strips of two different metals which expands on heating . it bends because it gets heated up on different rates causing a bending.

Answer 2

Hey friend,
Here is your answer:

A bimetallic strip is a strip of two metals bolted together. It is used to check the expansion of metals. This strip when heated expands and the metals expand according to their boiling point.
A bimetallic strip of brass and iron bends on heating because they expand and as one metal expands less than the other, it bends downwards.

Hope it helps u.