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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
- when a magnetic field is applied on a stationary electron, then it
- Two metal spheres of radii 0.01m and 0.02m are given a charge of 15mC and 45mC
- Changing magnetic fields can set up current loops in nearby metal bodies
- Two bulbs when connected in parallel to a source take 60W each, the power consumed,
- The value of Planck’s constant is
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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