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A capacitor C, a variable resistor R and...

A capacitor C, a variable resistor R and a bulb B are connected in series to the ac mains in circuits as shown if Fig. The bulb glows with some brightness. How will the glow of the bulb change if (i) a dielectric slab is introduced between the plates of the capacitor, keeping resistance T to be the same, (ii) the resistance R to be the same, (ii) the resistance R is increased keeping the same capacitance.

Text Solution

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Increased resistance will decrease the current in the circuit, which will decrease glow of the bulb.
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