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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 biconvex lens of glass having refractive index 1.47 is dipped in a liquid
- Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen
- At a metro station, a girl walks up a stationary escalator in time t₁
- A particle with total energy E is moving in a potential energy region U(x)
- An ideal heat engine works between temperature T₁=500 K and T₂=375 K.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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