Two Rods One of Copper and the Other of Mild

question 26

Multiple Choice

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
• C)37,500 kg
• D)nothing can be predioted as the data is insufficient
• E)more wax will melt on mild steel rod as compared to copper rod

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