When electric welding in an arc at a voltage of 30 V, the current strength reaches 150 A. What is the arc resistance?

univerkov | August 14, 2021 | education

U = 30 V.
I = 150 A.
R -?
According to Ohm’s law, the current I is directly proportional to the voltage U and inversely proportional to the resistance of the conductor R: I = U / R.
Let us express the resistance: R = U / I.
R = 30V / 150A = 0.2 ohm.
Answer: arc resistance during welding R = 0.2 Ohm.

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