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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: - In Young’s double slit experiment, the slit seperation is 1 mm and the screen
- The self induced e.m.f. in a 0.1 H coil when the current in it is changing
- Which of the two have same dimensions?
- What is the voltage gain in a common-emiiter amplifier, when input resistance is 4 Ω
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In Young’s double slit experiment, the slit seperation is 1 mm and the screen
- The self induced e.m.f. in a 0.1 H coil when the current in it is changing
- Which of the two have same dimensions?
- What is the voltage gain in a common-emiiter amplifier, when input resistance is 4 Ω
- The horizontal range of a projectile is 4√3 times the maximum height achieved
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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