<p>Figure 7.63&nbsp;shows a capacitor C, a&nbsp;variable resistor R and a bulb connected in series to the ac source of frequency (v). The bulb glows with some brightness. How will the glow of the bulb be affected, if</p>

<p><img alt="" src="https://school.achievam.com/upload/questionbank/question/que_1759025346.PNG" style="height:185px; width:204px" /></p>

<p>(a) the separation between the plates of the capacitor is doubled, keeping resistance R and frequency (v) the same ?</p>

<p>(b) the resistance R is decreased keeping the value of capacitance C and frequency (v) name ?</p>

<p>(c) the frequency of ac source is decreased for the&nbsp;same value of C and R ?</p>

<p>(d) a dielectric slab is introduced between the plates of the capacitor, keeping resistance R&nbsp;to be the same ? Justify your answer in each Case.</p>