A circular metal loop is heated at point O as shown in the figure below

[AmarCBSE]

A circular metal loop is heated at point O as shown in the figure below.

1. In which direction would heat flow in the loop?
2. In which order the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other?

Answer:

1. The heat will flow in both the directions, i.e., from O to P and O to R.
2. At first the pins at R and P will fall simultaneously followed by the pin at Q.