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Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 micro-ohms and current f low time of 0.2 second, heat generated during the process will be
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- 0.2 Joule
- 1 Joule
- 5 Joule
- 1000 Joule
- 0.2 Joule
Correct Option: D
Heat generated during the process = i2R∆t
Heat generated during the process = (5000)2 × (200 × 10–6) × 0.2 = 1000 Joules.
