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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 solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length
- To measure the roughness of the surface of a material, which of the following microscope
- When ₃Li⁷ nuclei are bombarded by protons, and the resultant nuclei are ₄Be⁸,
- A current is flowing through resistance. A potential difference of 120 V
- A charged particle enters a uniform magnetic field with a certain speed at right angles
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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