Correct Answer - Option 4 : 0.3 to 0.5 lagging
Spot welding:
- It is used primarily for welding two or more metal sheets together by applying pressure and heat from an electric current to weld area.
- It works by contacting copper alloy electrodes to the sheet surfaces, whereby pressure and electric current are applied and heat is generated by the passage of current through resistive materials such as low carbon steels.
In Spot Welding:
Voltage = less than 8 V.
Current = 5000 Amp.
Power Factor = 0.3 – 0.5 lagging
Ex. Welding of a car body.
