Physics on General Knowledge related Questions and Answers

Question :   On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because 1. metals have higher thermal capacity than plastics 2. plastics have a lower density than metals 3. metals are good conductor of heat 4. plastics have a higher thermal conductivity than metals Answer :   3 - metals are good conductor of heat