Question

If power factor is 1/2 in a series lr circuit r = 100 ohm, ac mains is used, then l is

Answer 1

Hi there..

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power factor : cosФ= R/Z

R= Resistance

Z= impedance

from the given data ... we find that Z = 200 Ω

and we know V = I Z

so..... I = V/Z

and usually ... AC in India is supplied at 240V 50hz..

=> V=240V

so ... we get..

I = 240/200

⇒ I = 1.2A

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