What is a bimetallic stirp and How is a fire alarm made using a bimetallic strip?
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a bimetallic strip is used when it is heat and bend it only use in alarm clock
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Explanation:
For converting a temperature shift into mechanical displacement, a bimetallic strip is used. The strip consists of two different metal strips that expand at different rates as they are heated, usually steel and copper, or steel and brass in some cases.
The bimetallic strip in a fire alarm consists of two metals bonded together to form one piece of metal with distinct expansion rates. The high-expansion side bends the strip towards an electrical contact when the strip is heated by fire. This strip then responds to the heat by closing an open electrical circuit to activate the alarm.
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