If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is,

If In A Lr Series Circuit The Power Factor Is Physics Question

If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is, when AC mains is used

Options

(a) πH
(b) √3/π H
(c) π/√3 H
(d) √2/π H

Correct Answer:

√3/π H

Explanation:

power factor, cos ɸ = 1 / 2 ⇒ ɸ = 60°

Therefore, tan 60° = ωL / R ⇒ √3 = (2πv × L) / 100

L = [(√3 × 100) / (2π × 50)] = (√3 / π) H

Related Questions:

  1. A particle in simple harmonic motion is described by the displacement function
  2. A metal bar of length L and area of cross-section A is clamped between two rigid
  3. Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å
  4. A police jeep is chasing a culprit going on a motorbike.The motorbike crosses
  5. The nuclear fusion reaction between deutrium and tritium takes place

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Your email address will not be published.


*