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

Option: 1

The bulb glows dimmer


Option: 2

The bulb glows brighter


Option: 3

Total impedance of the circuit is unchanged


Option: 4

Total impedance of the circuit increases


Answers (1)

best_answer

I_{\text {rms }}=\frac{V_{\text {rms }}}{\sqrt{R^2+\frac{1}{\omega^2 c^2}}}
When \omega increases, I_{\text {rms }} increases so the bulb glows brighter.

Posted by

Irshad Anwar

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