Question

A bulb and a capacitor are connected in series to an ac source of variable frequency. How will the brightness of the bulb change on increasing the frequency of the ac source?

Answer 1

Answer:

The brightness will increase with the increase in frequency. Bulb and capacitor are connected in series with variable frequency ac source. So, the total impedance of the circuit will depend upon the frequency and as the frequency will increase the impedance will decrease and vice-versa.