Question

When we touch a steel rod and paper simultaneously, we feel that the rod is colder because:
$(A)$ iron being a conductor conducts more heat from our body
$(B)$ paper being a good conductor conducts more heat from our body
$(C)$ more heat flows from the iron to our body
$(D)$ more heat flows from the paper to our body.

Answer 1

To answer this question we must have the knowledge about conductors and insulators. Note that, the conductors transfer heat from one body to another in the manner of high heat to low heat. That’s why there might be a feeling of less heat in touching a conductor when the heat from our body transfers to it. And, the insulators cant conduct any heat.

Complete step by step answer:
When we touch a steel rod and a paper simultaneously, we feel the rod is comparatively colder because iron is a good conductor of heat, heat from our hand flows to steel but there is no transfer of heat from our hand to paper as it is an insulator of heat.
Now let us consider the given options:
$(A)$ iron being a conductor conducts more heat from our body:
That can be true as per the above logic that heat from our hands or body flows to the iron and that’s why it seems cold to us when touching it.
$(B)$ paper being a good conductor conducts more heat from our body
We know that paper is an insulator. So as per the above logic, no heat can flow from our body to the paper. Hence the option is wrong.
$(C)$ more heat flows from the iron to our body:
This can’t be possible since the heat can flow from a hotter body to a colder body.
$(D)$ more heat flows from the paper to our body:
This is absurd because being an insulator no heat flows from paper to our body.

So, the correct answer is “Option A”.

Note:
The hot liquid holders are not usually made up of metal because metal is a good conductor of heat. and when much hot liquid is poured in those during this time the metallic pot may get heated and can burn our hands so we don't use metal for manufacturing pots and the substances like glass and mud those are insulators is used to make the pots.