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    Question

    Which of the following is a good conductor of heat but a

    bad conductor of electricity?
    A Celluloid Correct Answer Incorrect Answer
    B Rubber Correct Answer Incorrect Answer
    C Asbestos Correct Answer Incorrect Answer
    D Mica Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Good conductors of heat are good conductors of electricity. Mica is an exception which although being a good conductor of heat and a bad conductor of electricity. It is commonly used in insulation of electricity between high heat generating transistors and their heat sink and or chassis to prevent grounding out of component and to assist in the transfer of the generated heat to the heat sink or chassis for dissipation.

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