Question

12. When heating one end of a metal
plate, the other end gets hot because
of...
O The resistance of the metal
O Mobility of the atoms in the metal
O Energised electrons moving to the other end
O Minor perturbation in the energy of stom​

Answer 1

Answer:

C

Explanation:

energised electrones moves due to excitement and as it is metal good conductor of heat it is transferred to whole metal

Answer 2

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The heat reaches from one end to another end of a metal due to heat transfer process of conduction.

Conduction is mainly seen in case of solids because of the presence of free electrons. The free electrons when recieve heat, get excited due to the increase in the kinetic energy. Hence, The correct option is:

Energised electrons moving to other end✓ (Option C)

Now let's have a look on other options:

Resistance of the metal: When electrons collide with atoms nearby, they cause resistance but this is not the reason for conduction.

Mobility of the atoms in the metal: Atoms inside the metal are not mobile, they are fixed in the position due to high interatomic forces. Hence, this is also not the correct one.

Minor perturbation in the energy of atom: Perturbation means change in arrangement of the atom which will not help in the conduction of heat.