Question

A bulb and a capacitor are in series with an ac source. On increasing frequency, glow of the bulb .

• A. increases
• B. decreases
• C. remains same
• D. quenches

Answer 1

The correct option is A increases

The glow increases because, when frequency v is increased, the capacitive reactance $X_c=\frac{1}{2\pi vC}$ decreases and hence the current through the bulb increases which will lead to increase in glow