NEET2020Physics-Alternating Current
NEET 2020 Physics Capacitive Reactance MCQ Question
Type: MCQ-numerical-Easy-Class 12
A 40 μF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly :
A
2.5 Å
B
25.1 Å
C
1.7 Å
D
2.05 Å
Correct Answer
Option A
Detailed Explanation
Capacitive reactance Xc = 1/(2πfC) = 1/(2π × 50 × 40 × 10⁻⁶) ≈ 79.6 Ω. Irms = Vrms/Xc = 200/79.6 ≈ 2.51 A. The correct answer is A (approximately 2.5 A). The original explanation used the wrong formula and obtained 2.05 A.
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