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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
- Four point masses, each of value m, are placed at the corners of a square ABCD
- A particle moving along X-axis has acceleration f,at time t given by f=fₒ(1- t/T)
- The average power dissipated in AC circuit is 2 W. If a current flowing through
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- A parallel plate capacitor as a uniform electric field E in the space between the plates
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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