Question

In a resistance welding of a lap joint or two mild steel sheets of 1.5 mm thick, a current of 10 000 A is passed for a period of 0.1 seconds. The effective resistance of the joint is 120 micro ohms. Density of steel is 0.00786 g/mm3 and heat required to melt is 1381 J/g. The joint can be considered as a cylinder of 5 mm diameter and 2.25 mm in height. Calculate the percentage of heat distributed to the surroundings.​

Answer 1

Answer:

Explanation:

In a resistance welding of a lap joint or two mild steel sheets of 1.5 mm thick, a current of 10 000 A is passed for a period of 0.1 seconds. The effective resistance of the joint is 120 micro ohms. Density of steel is 0.00786 g/mm3 and heat required to melt is 1381 J/g. The joint can be considered as a cylinder of 5 mm diameter and 2.25 mm in height. Calculate the percentage of heat distributed to the surroundings.​