An $A C$ voltage source of variable angular frequency $ω$ and fixed amplitude $V_{0}$ is connected in series with a capacitance $C$ and an electric bulb of resistance $R$ (inductance zero). When $ω$ is increased

the bulb glows dimmer

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the bulb glows brighter

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total impedance of the circuit is unchanged

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total impedance of the circuit increases

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Solution

The correct option is C the bulb glows brighter
Impedance $Z = \sqrt{\frac{1}{(ω C)^{2}} + R^{2}}$
As $ω$ increases, $Z$ decreases.
Hence, bulb will glow brighter.

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An AC voltage source of variable angular frequency ω and fixed amplitude V0 is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When ω is increased

The correct option is C the bulb glows brighterImpedance Z=√1(ωC)2+R2 As ω increases, Z decreases. Hence, bulb will glow brighter.

An $A C$ voltage source of variable angular frequency $ω$ and fixed amplitude $V_{0}$ is connected in series with a capacitance $C$ and an electric bulb of resistance $R$ (inductance zero). When $ω$ is increased

The correct option is C the bulb glows brighter
Impedance $Z = \sqrt{\frac{1}{(ω C)^{2}} + R^{2}}$
As $ω$ increases, $Z$ decreases.
Hence, bulb will glow brighter.