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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
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three identical spheres, each of mass 3 kg are placed touching each other
- A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic
- A remote-sensing satellite of earth revolves in a circular orbit at a height
- An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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