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 Physics Question

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. For non-conductors, the energy gap is
  2. A boy playing on the roof of a 10m high building throws a ball with a speed
  3. Two liquid drops having diameters of 1 cm and 1.5 cm. The ratio of excess
  4. The electric resistance of a certain wire of iron is R. If its length and radius
  5. Minority carriers in a p-type semiconductor are

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*