General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 45)
45.
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
Discussion:
8 comments Page 1 of 1.
Revjith s u said:
1 decade ago
Please explain phenomenon about how ?
Siddarth said:
1 decade ago
Actually the correct answer would be metals have high thermal conductivity than plastics as soon as you touch the pen your body heat is emitted onto the metal cap faster as you are cold metal cap becomes cooler.
Anupma Agarwal said:
1 decade ago
Metal have higher thermal conductivity so it transfers the heat to the hand almost immediately so it feels colder than plastic.
Ashok kumar said:
1 decade ago
Higher thermal conductivity means good conductor then why answer is not higher thermal conductivity?
Kingsley said:
1 decade ago
Actually I go for the option A, but am surprise to see them choosing C, but in the real sense we all know that metals are good conductors, but the question involves the comparison of metal and plastic.
Raj said:
1 decade ago
In option 1 its given capacity. So answer is 3.
Nikhil said:
9 years ago
Absorption and release of heat take place in constant time in metals i.e. time taken to heat the metal is equal to the time taken in cooling the metal at the constant temperature.
Ameerkhan jalbani said:
7 years ago
C is the right option. I agree with the given answer.
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