Physics-Alternating Current
NEET Physics Alternating Current MCQ Question
Type: MCQ-Medium
If an ac main supply is given to be 220 V. What would be the average e.m.f. during a positive half cycle?
A
198 V
B
386 V
C
256 V
D
None of these
Correct Answer
Option A
Detailed Explanation
E_rms = 220 V, so E₀ = E_rms × √2 = 220√2 V. Average EMF over positive half cycle = 2E₀/π = 2 × 220√2 / π ≈ 198 V.
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