Two rods one of copper and the other of mild steel, both of diameter 20 mm and length 250 mm are coated with a uniform layer of wax all around. These rods are placed vertically in a boiling water bath with 200 mm, length of each rod projecting outside. If the melting point of wax is 10?C, then

Question

Quizplus · Accepted Answer

Copper has a higher thermal conductivity than mild steel, which means it can transfer heat more efficiently from the boiling water to the wax. As a result, more wax will melt on the copper rod compared to the mild steel rod.

Two Rods One of Copper and the Other of Mild