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A coil of self-inductance L is connected...

A coil of self-inductance L is connected in series with a bulb B and an AC source.Brightness of the bulb decreases when

A

Frequency of the AC source is decreased

B

Number of turns in the coil is reduced

C

A capacitance of reactance Xc -XI is included in the same circuit

D

An iron rod is inserted in the coil

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