Question

A wooden spoon is dipped in a cup of ice cream. It's another end
A. become cold by the process of conduction.
B. become cold by the process of convection.
C. become cold by the process of radiation.
D. Does not become cold.

Answer 1

Hint Heat energy can be transferred from one part of a body to another. This is called Transmission of heat energy or simply Heat Transmission. There are mainly three ways of heat transmission conduction, convection and radiation. A good conductor of heat can transmit heat by any of these processes but a bad conductor of heat doesn’t allow heat to transfer from one part of a body to another. A wooden spoon is a bad conductor of heat.

Complete step by step answer
Let us first discuss the Transmission of heat.
Heat energy can be transferred from one part of a body to another. This is called Transmission of heat energy or simply Heat Transmission. There are mainly three ways of heat transmission
1. Conduction: In this process, heat is transferred from higher temperature to lower without any actual movements of particles.
2. Convection: In this process, heat transfer takes place through the movement of particles of fluid (liquid or gas).
3. Radiation: In this process, heat transfer takes place in the form of electromagnetic waves.
A good conductor of heat can transmit heat by any of these processes but a bad conductor of heat doesn’t allow heat to transfer from one part of a body to another. A wooden spoon is a bad conductor of heat. So, if it is dipped in a cup of ice cream, its other end does not become cold.

Hence, option D is correct.

Note: In the process of radiation, there is no requirement of any medium for propagation of heat and it propagates without heating the intervening medium.
Thermal conduction happens due to the transfer of internal energy by microscopic collisions of particles and movement of electrons within a body. Metals and stones are considered as good conductors of heat.