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Resistance sp...

Question

Resistance spot welding is performed on two plates of 1.5 mm thickness with a 6 mm diameter electrode. using 15000 A current for a time duration of 0.25 sec. Assuming the interface resistance to be 0.0001 $Ω$ . The heat generated to form the weld is

A

5625 W-sec

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B

8437 W-sec

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C

33750 W-sec

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D

22500 W-sec

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Solution

The correct option is A 5625 W-sec
$Heat generated in resistance welding$

$= I^{2} R T = (15000)^{2} \times 0.0001 \times 0.25 = 5625 W - s e c$

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