A bulb and a capacitor are connected in series across an ac supply....

A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

Options

Aincreases
Bdecreases
Cremains same
Dbecomes zero

Correct answer

A. increases

Step-by-step solution

Z=\sqrt{R^2+X_C^2} \& X_C=\frac{1}{W C}

due to dielectric

\mathrm{C} \uparrow \Rightarrow \mathrm{X}_{\mathrm{C}} \downarrow \Rightarrow \mathrm{Z} \downarrow

So, current increases

\&

thus bulb will glow more brighter.

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