Question

An alternating voltage, $E_{\left(volts\right)}=220\sqrt{2}sin\left(100t\right)$ is connected to one microfarad capacitor through an ac ammeter. The reading of the ammeter shall be

• A. 220 mA
• B. 22 mA
• C. 311 mA
• D. 31 mA

Answer 1

Answer: (B)

22 mA

$X_C=\frac{1}{\omega C}$

$X_C=\frac{1}{100\times {10}^{-6}}$

$X_C={10}^4$

Ammeter reading will be:

$i_{rms}=\frac{V_{rms}}{X_C}$

$i_{rms}=220/{10}^4$

$i_{rms}=22mA$.