⇦ | ⇨ |
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 required to charge a parallel plate condenser of plate separation d
- The identical cells connected in series are needed to heat a wire of length one meter
- The radius of orbit of a planet is two times that of the earth. The time period
- Two cells, having the same e.m.f. are connected in series through an external resistance
- In a pure capacitive A.C circuit, current and voltage differ in phase by
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The energy required to charge a parallel plate condenser of plate separation d
- The identical cells connected in series are needed to heat a wire of length one meter
- The radius of orbit of a planet is two times that of the earth. The time period
- Two cells, having the same e.m.f. are connected in series through an external resistance
- In a pure capacitive A.C circuit, current and voltage differ in phase by
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