Question

Name any 3 devices which uses bi-metallic strips

Answer 1

Steel and brass. Fire alarms and fans are the examples of bi-metallic strip devices.

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Answer 2

When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. If the strip is cooled, it curves with the steel on the outside. Bimetallic strips are used as switches in thermostats.