A coil of copper wire is connected in series with a bulb, a battery and a switch. When the circuit is completed thebulb lights up immediately . The circuit is switched off and a rod of soft iron is placed inside the coil . On completing the circuit again . It is observed that :-

A coil of copper wire is connected in series with a bulb, a battery an

1.	A coil of copper wire is connected in series with a bulb, a battery and a switch. When the circuit is completed thebulb lights up immediately . The circuit is switched off and a rod of soft iron is placed inside the coil . On completing the circuit again . It is observed that :-
Answer» Bulb is not so BRIGHT There is a slight deley before bulb lights to its normal brightness The bulb is initially bright but GRADUALLY BECOMES dim The bulb is bright than before Answer :b

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A coil of copper wire is connected in series with a bulb, a battery and a switch. When the circuit is completed thebulb lights up immediately . The circuit is switched off and a rod of soft iron is placed inside the coil . On completing the circuit again . It is observed that :-

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