It is desirable to operate the arc furnaces at power factor of_____________?
Correct answer: B. 0.707 lagging
- A. zero
- B. 0.707 lagging
- C. unity
- D. 0.707 leading
Explanation
Arc furnaces behave largely as inductive loads and commonly operate at a lagging power factor near 0.7. Hence 0.707 lagging is the intended operating value among the choices.
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