| ⇦ | 
| ⇨ |
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: - Consider 3rd orbit of He⁺(helium), using non-relativistic approach, the speed
- When an electron beam passes through an electric field they gain kinetic energy.
- The order of radius of the nucleus of an atom is
- Electron in hydrogen atom first jumps from third excited state to second excited
- An air core solenoid has 1000 turns and is one meter long. Its cross sectional area
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Consider 3rd orbit of He⁺(helium), using non-relativistic approach, the speed
- When an electron beam passes through an electric field they gain kinetic energy.
- The order of radius of the nucleus of an atom is
- Electron in hydrogen atom first jumps from third excited state to second excited
- An air core solenoid has 1000 turns and is one meter long. Its cross sectional area
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
Leave a Reply