Question

A metal ring is placed above a candle as shown. Four points on its circumference, $\text{O},\text{P},\text{Q}$ and $\text{R}$, are marked equidistant from one another. In which direction does the heat flow in the loop?

• A. In the loop $\text{OPRQ}$
• B. From $\text{O}$ towards $\text{P}$ and $\text{Q}$ simultaneously
• C. In the loop $\text{OQRP}$
• D. All the four points heat up simultaneously

Answer 1

The correct option is B From $\text{O}$ towards $\text{P}$ and $\text{Q}$ simultaneously

When the metal ring is heated, the point $\text{O}$ would heat firstly. The heat is then transferred to the points $\text{P}$ and $\text{Q}$ simultaneously, and then finally, the heat reaches the point $\text{R}$, and it becomes hot.