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

Mr. Dubey • 52.30K Points
Coach

Q. 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

(A) equal quantity of wax will meet on the two rods

(B) more wax will melt on copper rod as compared to mild steel rod

(D) nothing can be predioted as the data is insufficient

Correct : Option (B)