| ⇦ | 
| ⇨ |
The rms current in an AC circuit is 2 A. If the wattless current be √3 A, what is the power factor of the circuit?
Options
(a) (1/2)
(b) (1/3)
(c) 1/√3
(d) 1/√2
Correct Answer:
(1/2)
Explanation:
We know that, Iwʟ = I(rms) sin ɸ
⇒ √3 = 2 sin ɸ or, sin ɸ = √3 / 2 ⇒ ɸ = 60°
So, power factor = cos ɸ = cos 60° = 1 / 2
Related Questions: - The energy released by the fission of one uranium atom is 200 MeV.
- For photoelectric emission from certain metal the cut-off frequency is v
- Two sources of sound placed close to each other are emitting progressive waves
- The work function of metals is in the range of 2 eV to 5 eV.
- A point charge is kept at the centre of a metallic insulated spherical shell. Then
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The energy released by the fission of one uranium atom is 200 MeV.
- For photoelectric emission from certain metal the cut-off frequency is v
- Two sources of sound placed close to each other are emitting progressive waves
- The work function of metals is in the range of 2 eV to 5 eV.
- A point charge is kept at the centre of a metallic insulated spherical shell. Then
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