An inductor L of inductance XL is connected in series with a (3 marks)
bulb B and an ac source. How would brightness of the bulb
change when (i) number of turns in the inductor is reduced,
(ii) an iron rod is inserted in the inductor and (iii) a capacitor
of reactance XC = XL is inserted in series in the circuit. Justify
your answer in each case.