Question

12. A circular metal loop is heated at point O as shown in figure.
R
a) in which direction, would heat flow in the loop?
b) 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

(i) Heat flows in solids at the same rate in all directions, hence heat will flow from O to P and likewise from O to R.

(ii)The heat first travels to R and P, causing the pins R and P to fall first. After that, the heat travels to point Q, causing the pin Q to fall.