Question

30. An AC voltage source of variable angular frequency w and fixed amplitude VO is connected in ser
a capacitance C and an electric bulb of resistance R (inductance zero). When is increased then,
(A) The bulb glows dimmer
(B) The bulb glows brighter
(C) Total impedance of the circuit increases
(D) Total impedance of the circuit is unchanged​

Answer 1

Answer:

the bulb glows brighter

Impedance Z=

(ωC)

2

1

+R

2

As ω increases, Z decreases.

Hence, bulb will glow brighter.