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MediumQ. No. which-of-the-following-is-classified-as-a-good-conductor-of-heat
Which of the following is classified as a good conductor of heat?
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AWood
BGlass
CSilver (metal)
DAsbestos
Correct Answer: Silver (metal)Your Answer: C
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Conductors of heat are materials through which heat passes easily and rapidly. Option A (Wood) is incorrect — wood is a bad conductor (insulator) of heat. This is why wooden handles are used on cooking utensils, as wood does not allow heat to flow to the hand. Wood has very low thermal conductivity. Option B (Glass) is incorrect — glass is also a bad conductor of heat. This is why double-glazed windows trap air between glass panes to reduce heat transfer. Glass wool is used as thermal insulation in buildings. Option C (Silver) is CORRECT — all metals are good conductors of heat, and silver is the BEST thermal conductor among all metals. Other good conductors include copper, aluminium, iron, and other metals. According to the image, good conductors include all metals, water, and the human body. The high thermal conductivity of metals is due to free electrons that carry heat energy rapidly through the material. Option D (Asbestos) is incorrect — asbestos is a thermal insulator, used specifically because it does NOT conduct heat. Asbestos is used in fireproof clothing, heat shields, and insulation boards. It is classified as a thermal insulator (ऊष्मारोधी) alongside ebonite. For exams: Metals = good conductors; Wood, Glass, Silica, Cotton, Wool = bad conductors; Ebonite, Asbestos = thermal insulators.
FAQ
Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
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