Question

An alternating voltage $E=200\sqrt{2}sin\left(100t\right)$ is connected to a 1 microfarad capacitor through an ac ammeter. The reading of the ammeter shall be

• A. 10 mA
• B. 20 mA
• C. 40 mA
• D. 80 mA

Answer 1

The correct option is B 20 mA

Reading of ammeter = $i_{rms}=\frac{V_{rms}}{X_C}=\frac{V_0\omega C}{\sqrt{2}}$
=$\frac{200\sqrt{2}\times 100\times (1\times {10}^{-6})}{\sqrt{2}}=2\times {10}^{-2}A=20mA$