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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]
Related Questions: - Two lenses of power 15 D and -3 D are placed in contact.
- If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two lenses of power 15 D and -3 D are placed in contact.
- If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
- Two spheres of mass m and M are situated in air and the gravitational force
- An α-particle of energy 5 MeV is scattered through 180⁰ by a fixed uranium nucleus.
- An object is attached to the bottom of a light vertical spring and set vibrating.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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