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

Related Questions:

1. The ionization energy of Li⁺⁺ is equal to
2. If wavelength of a wave is λ=6000 Å, then wave number will be
3. A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4
4. The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
5. A rod of weight W is supported by two parallel knife edges A and B is in equilibrium

Topics: Alternating Current (96)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends