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If an A.C. mains supply is given to be 220 V, what would be the average e.m.f. during a positive half cycle?
Options
(a) 256 V
(b) 512 V
(c) 386 V
(d) 198 V
Correct Answer:
198 V
Explanation:
Vₐᵥ = 2V₀ / π = (2 / π) [V(rms) × √2] = (2√2 / π) × V(rms)
Vₐᵥ = (2√2 / π) × 220 = 198 V
Related Questions: - If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by
- Which of the following are mechanical waves?
- In a compound microscope, the focal length of the objective is 2.5 cm and of eye lens
- According to photon theory of light which of the following physical quantities,
- Light propagates rectilinearly because of its
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by
- Which of the following are mechanical waves?
- In a compound microscope, the focal length of the objective is 2.5 cm and of eye lens
- According to photon theory of light which of the following physical quantities,
- Light propagates rectilinearly because of its
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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