Q. A bulb and a capacitor are in series with an ac source. On increasing frequency how will glow of the bulb change
A) The glow decreases
B) The glow increases
C) The glow remain the same
D) The bulb quenches
Explanation
(b) This is 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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.