MCQ
An alternating voltage $E=200 \sqrt{2} \sin (100 t)$ is connected to a 1 microfarad capacitor through an ac ammeter. The reading of the ammeter shall be
- A$10\ mA$
- ✓$20 \ mA$
- C$40\ mA$
- D$80\ mA$
✓
Answer
Correct option: B.
$20 \ mA$
(b) Reading of ammeter $=i_{r m s}=\frac{V_{r m s}}{X_C}=\frac{V_0 \omega C}{\sqrt{2}}$$=\frac{200 \sqrt{2} \times 100 \times\left(1 \times 10^{-6}\right)}{\sqrt{2}}=2 \times 10^{-2} \mathrm{~A}=20 \mathrm{~mA}$
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