| ⇦ | 
| ⇨ |
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: - In Young’s double slit experiment, the ratio of maximum and minimum intensities
- Two cities are 150 km apart. Electric power is sent from one city to another city
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- The electron drift speed is small and the change of the electron is also small
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In Young’s double slit experiment, the ratio of maximum and minimum intensities
- Two cities are 150 km apart. Electric power is sent from one city to another city
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- The electron drift speed is small and the change of the electron is also small
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