Question

Question 19

Observe the below picture. Water is being boiled in a pan of wide base

(i) Which position P or T will feel warmer?
(ii) Fill up the boxes P and T to indicate the predominant mode of heat transfer.

Answer 1

Position ‘P’ will feel warmer due to the hot air rising up.
P $\to$ Convection
T $\to$ Radiation

The flow of heat to P is a convection process because the air near the boiling water gets hot and rises. However, on the sides such as at T, there is no convection and air does not feel as hot as at the top. Therefore, the flow of heat to T is a radiation process.