Multiple choice

Which of the following is a good conductor of heat but bad conductor of electricity?

  1. Mica

  2. Asbestos

  3. Celluloid

  4. Pertex
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A Correct answer
Explanation

Mica is a bad conductor of electricity but it is a good conductor of heat. Due to the flow of current through the coil, it becomes heated and the heat is transferred to the metal part through mica. Finally, the metal part becomes heated. 

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