Where is bimetallic strip used?

A bimetallic strip is used in:

How is bimetallic strip used in fire alarm?

What is a bimetallic strip?

A bimetallic strip of brass and iron is straight at room temperature. When this bimetallic strip is heated it bends, such that:

We use bimetallic strips as thermostat switch.

What is a bimetallic strip made of?

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

Draw a neat diagram to show how bimetallic strip is used in a fire alarm system.

A bimetallic strip consists of metals X and Y. It mounted rigidly at the base as shown. The metal X has a higher coefficient of expansion compared to that for metal Y. When the bimetallic strip is placed in a cold bath

A bimetallic strip consists of metals X and Y. It mounted rigidly at the base as shown. The metal X has a higher coefficient of expansion compared to that for metal Y. When the bimetallic strip is placed in a cold bath