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The rms current in an AC circuit is 2 A. If the wattless current be √3 A, what is the power factor of the circuit?
Options
(a) (1/2)
(b) (1/3)
(c) 1/√3
(d) 1/√2
Correct Answer:
(1/2)
Explanation:
We know that, Iwʟ = I(rms) sin ɸ
⇒ √3 = 2 sin ɸ or, sin ɸ = √3 / 2 ⇒ ɸ = 60°
So, power factor = cos ɸ = cos 60° = 1 / 2
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A battery of e.m.f. E and internal resistance r is connected to an external resistance
- A double slit experiment is performed with light of wavelength 500 nm. A thin film
- A particle has initial velocity (3i + 4j) and acceleration (0.1 i+0.3j). It’s speed after 10s
- A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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