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On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :
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- metals have higher thermal capacity than plastics
- plastics have a lower density than metals
- metals are good conductors of heat
- plastics have a higher thermal conductivity than metals
- metals have higher thermal capacity than plastics
Correct Option: C
On a chilly day, the room temperature is lower than our body temperature. Since metals have a higher coefficient of thermal conductivity than plastic, they are better conductor of heat than plastic. So, when we touch the metal cap and the plastic body of a pen, heat from our fingers will flow to the metal cap much more quickly than to the plastic body.
