| ⇦ | 
| ⇨ |
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: - A planet moving along an elliptical orbit is closest to the sun at a distance of r₁
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- The maximum wavelength of radiations emitted at 900K is 4 µm. What will be the maximum
- To draw the maximum current from a combination of cells, how should be the cells
- The input resistance of a silicon transistor is 100 W. Base current is changed
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A planet moving along an elliptical orbit is closest to the sun at a distance of r₁
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- The maximum wavelength of radiations emitted at 900K is 4 µm. What will be the maximum
- To draw the maximum current from a combination of cells, how should be the cells
- The input resistance of a silicon transistor is 100 W. Base current is changed
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