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The power factor of an AC circuit having resistance R and inductance L connected in series to an AC source of angular frequency ω is
Options
(a) zero
(b) ωL/R
(c) R/√R²+ω²L²
(d) R/ωL
Correct Answer:
R/√R²+ω²L²
Explanation:
power factor, cos ɸ = R / Z = R / √[R² +ω²L²]
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- The threshold frequency for a photosensitive metal is 3.3 x 10¹⁴ Hz.
- A solid cylinder of mass 50kg and radius 0.5 m is, free to rotate about the horizontal axis
- In Young’s experiment, the ratio of maximum to minimum intensities of the fringe
- A particle of mass M is suited at the centre of a spherical shell of same mass and radius
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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