| ⇦ | 
| ⇨ |
An alternating voltage e=200s in100t is applied to a series combination of R= 30Ω and an inductor of 400 mH. The power factor of the circuit is
Options
(a) 0.01
(b) 0.05
(c) 0.042
(d) 0.6
Correct Answer:
0.6
Explanation:
Xʟ = Lω = 0.4 × 100 = 40
R = 30 Ω
.·. Power factor, cos ɸ = R / √(R² × Xʟ²) = 30 / √(R² × Xʟ²) = 30 / √(30² × 40²) = 0.6
Related Questions: - The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic
- What is the energy of He⁺ electron in first orbit?
- A uniform electric field and uniform magnetic field are acting along the same
- The potential energy of a weightless spring compressed by a distance D is proportional
- Which scientist experimentally proved the existence of electromagnetic waves?
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic
- What is the energy of He⁺ electron in first orbit?
- A uniform electric field and uniform magnetic field are acting along the same
- The potential energy of a weightless spring compressed by a distance D is proportional
- Which scientist experimentally proved the existence of electromagnetic waves?
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