GK
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The metal is a few degrees cooler than the wood.
|
|
|
The metal is a better conductor of thermal energy than the wood.
|
|
|
The wood is a better conductor of thermal energy than the metal.
|
|
|
Your skin’s thermal receptors can be easily fooled.
|
Detailed explanation-1: -This observation is usually attributed to metals having higher thermal conductivity than wood. They extract more heat from your hand than wood in a given time. Therefore, you perceive the metal as being colder than the wood.
Detailed explanation-2: -Metal appears cool on touching because heat flows from body (at higher temperature) to iron (at lower temperature). This can happen only when metal conducts heat. Wooden surface does not feel cool as it is non-conductor of heat.
Detailed explanation-3: -The metal has high thermal conductivity, i.e., they conduct heat faster. and also metal is a good conductor of heat. Hence, it takes away your body heat as you touch it and which makes your body temperature to drop, therefore you feel the coldness when you touch a piece of metal.
Detailed explanation-4: -Metals are better conductors of heat than wood.
Detailed explanation-5: -that metal conducts heat better than wood, meaning you will experience the heat exchange as being more rapid when in contact with the metal than with the wood, giving the impression of the metallic block being hotter (colder) than the wooden one.