If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.

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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)

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