Question

What is bimetallic strip? Mention any two applications of it.

Answer 1

Bimetallic strip is used to convert a temperature change into a mechanical displacement. It consists of two strips of different metals which expands at different rates as they are heated. Usually steel and copper, or in some cases steel and brass is used in bimetallic strip.

Two applications are:

1. Used in fire alarms.
2. Used in mechanical clocks to remove the error caused by temperature change.