Relation between heat in a weld and current

Q.  The heat required by the weld is produced due to the contact resistance between the two pieces and is
- Published on 04 Sep 15

a. Directly proportional to the current
b. Directly proportional to the square of the current
c. Inversely proportional to the square of the current
d. Inversely proportional to the current

ANSWER: Directly proportional to the square of the current

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