Q1 of 15 Page 103

Collect information about bimetallic strips and discuss in your class how a fire alarm is made using it.

A bimetallic strip is made of two separate strips of metal stuck together. These two strips expand to a different extent when heated. So, when the strip is heated, one strip will be longer than the other. Therefore, the bimetallic strip will bend. An example is an iron and brass.


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