Question

An ac circuit has two branches in parallel. The impedances of the two branches are equal. The p.f. of one branch is 0.8 lagging and 0.8 leading. The overall p.f. is

a.

zero

b.

0.5 lagging

c.

1

d.

0.7 lagging

Answer: (d).0.7 lagging

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Q. An ac circuit has two branches in parallel. The impedances of the two branches are equal. The p.f. of one branch is 0.8 lagging and 0.8 leading. The overall p.f. is

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