Q. 144.3( 3 Votes )

(i) When an AC so

Answer :

(i) The instantaneous power supplied to the capacitor is

because average of sin2ωt is zero over the cycle.

(ii) As the capacitance is gradually reduced, so the capacitive reactance XC will increase. ()

the overall resistance will increase leading to the decrease in current. So, the brightness of the bulb reduces.

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