A light bulb and an air core inductor are connected in series to an a.c. source through a switch. The switch is closed and after sometime, an iron rod is inserted into the interior of the inductor. The light bulb
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → glows with less brightness
When the iron rod is inserted into the air core inductor, the induction increases, leading to an increase in total impedance of circuit.
This causes a decrease in the current through the light bulb, resulting in dimmer light.