An AC voltage source of variable angular frequency and fixed amplitude is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When is increased:
The bulb glows brighter
Explanation for Correct Option:
Option B
Explanation for Incorrect Options:
Option A:
The bulb will be dimmer if impedance increases, but since frequency increases impedance will decrease and the bulb will glow dimmer.
Option C:
As the frequency increases impedance will change.
Option D:
If angular frequency increases, the impedance will decrease and not increase.
Thus, option (B) is correct.