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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An object of mass 3kg is at rest. Now a force F=6t² i⃗+4t j⃗ is applied on the object
- For a cubic crystal structure which one of the following relations
- Consider the following two statements about Kirchhoff’s law
- Young’s modulus of the material of a wire is 18×10¹¹ dyne cm⁻².its value in SI is
- If the radius of star is R and it acts as a black body, what would be the temperature
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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