Q. 65 For spot welding of two steel sheets (base metal) each of 3 mm thickness, welding
current of 10000 A is applied for 0.2 s. The heat dissipated to the base metal is
1000 J. Assuming that the heat required for melting
volume of steel is 20 J
and interfacial contact resistance between sheets is 
) of weld nugget is ______
Answer: (150)
Explanation:
