Navigate

The rms current in an AC circuit is 2 A. If the wattless current be √3 A,

The rms current in an AC circuit is 2 A. If the wattless current be √3 A, what is the power factor of the circuit?

Options

(a) (1/2)
(b) (1/3)
(c) 1/√3
(d) 1/√2

Correct Answer:

(1/2)

Explanation:

We know that, Iwʟ = I(rms) sin ɸ

⇒ √3 = 2 sin ɸ or, sin ɸ = √3 / 2 ⇒ ɸ = 60°

So, power factor = cos ɸ = cos 60° = 1 / 2

JC2012
admin:

Related Questions

  1. A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
  2. At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
  3. Two strings A and B, made of same material are stretched by same tension
  4. The velocity of sound is V, in air. If the density of air is increased to four times
  5. A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz.