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A bulb connected in series with a soleno...

A bulb connected in series with a solenoid is lit by a.c. source. If a soft iron core is introduced in the solenoid, will bulb glow brighter ?

Text Solution

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No, the bulb will glow dimmer. This is because, on introducing soft iron core in the solenoid, its inductance L increases, the inductive reactance `X_(L) = omega L` increases and hence the current through the bulb decreases.
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