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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 wheel is rotating at 900 rpm about its axis.When the power is cut-off it
- A particle of mass m oscillates along x-axis according to equation x = a sin ?t
- In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
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- The resistance of a carbon resistor of colour code Red-Red Green Silver is(in kΩ)
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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