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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
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Topics: Alternating Current
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is
- Two resistors of 6Ω and 9Ω are connected in series to a 120 V source.
- A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00
- If rope of lift breaks suddenly, the tension exerted by the surface of the lift
- A solid sphere, a hollow sphere and a ring are released from top of an inclined
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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