Which of the following is a good conductor of heat?

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Plastic

Copper

Rubber

Ebonite

answer is B.

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Detailed Solution

Copper is a good conductor of heat.
Metals are generally pretty good conductors of heat. Some examples of metals are Copper, Iron, Aluminium, etc. Copper is used in many heating applications because it has better conductivity than many other metals. Non-metals such as Plastic, Rubber, Ebonite, etc., are bad conductors or insulators of heat. For example, Ebonite handles are used to hold hot utensils so that heat doesn’t conduct to our hands.

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