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Question

Identify the device shown in figure.


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Solution

  1. The device shown in fig is a bi metallic strip.
  2. A bi metallic strip is a thick strip made by welding steel and copper strip together.
  3. Since copper expands more than steel the bi metallic strip bends towards the copper strip on heating.
  4. It is used in thermostats.
  5. The thermostats are switches used to close or break electric contact automatically .

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