# Arc welding is carried out at a voltage of 50 V and a current of 100 A. Determine the power

Arc welding is carried out at a voltage of 50 V and a current of 100 A. Determine the power consumption and energy consumed in 40 minutes of work.

U = 50 V.

I = 100 A.

t = 40 min = 2400 s.

N -?

Q -?

The power of the electric current N is determined by the formula: N = I * U, where I is the current in the conductor, U is the voltage at its ends.

N = 100 A * 50 V = 5000 W.

The energy of the current Q, which flows through the conductor, is determined by the Joule-Lenz law: Q = I * U * t, where t is the time the current passes through the conductor.

Q = 100 A * 50 V * 2400 s = 12,000,000 J.

Also, the energy of the current Q can be expressed by the formula: Q = N * t.

Answer: welding power consumption N = 5000 W, welding consumes Q = 12,000,000 J of energy.

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