A wooden spoon is dipped in a cup of ice cream. Its other end
$(a)$. becomes cold by the process of conduction.
$(b)$. becomes cold by the process of convection.
$(c)$. becomes cold by the process of radiation.
$(d)$. does not become cold.

AcademicPhysicsNCERTClass 7

The correct answer is: $(d)$. does not become cold.

Explanation:

When a wooden spoon is dipped in a cup of ice cream. Its other end does not become cold. 

Reason:

Wood is not a good conductor of heat. So there is no heat transfer through the wood materials. Heat can not be transferred through any materials that are poor conductors of heat. So, it can't allow heat to pass through any of the processes. On dipping one end of a wooden spoon in a cup of ice cream, the temperature of its other end will remain the same as there is no heat transfer occurring between both ends.

So, its end can't become cold by any of the processes given below-

The process of conduction.

The process of convection.

The process of radiation.

Conclusion:

Therefore, the other end of the spoon does not become cold when the wooden spoon is dipped into a cup of ice cream.

So, option $(d)$ is correct.

raja
Updated on 10-Oct-2022 13:25:51

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