Question
Download Solution PDFFor spot welding of 1 mm thick sheet with a current flow time of 0.2 s, the heat generated is 1000 J. If the effective resistance is 200 μΩ, the current required is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Heat generated (Q) in the spot welding is given by, Q = I2 × R × t
Where I is the flow of current, R is the resistance and the t is the duration for which the current flows
Calculation:
Given, Current flow time t = 0.2 s, Heat generated = 1000 J and, Resistance = 200 μΩ
1000 = I2 × 200 × 10-6 × 0.2
I = 5000 ALast updated on Jul 2, 2025
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