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Heat Transfer without Losing Heat

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Question

There are four cups made of different materials: Silver, aluminium, wood and copper. In which of these will tea remain warm for a longer time?

A

Silver cup

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B

Aluminium cup

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C

Wooden cup

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D

Copper cup

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Solution

The correct option is C Wooden cup
Wooden cup being a bad conductor of heat does not allow heat transfer. So, tea remains warmer for a longer time in a wooden cup. Whereas, silver, aluminium and copper being metals are good conductors of heat. They allow heat transfer through them. So tea does not remain warmer for long time in them.

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