Question 463: AC fundamentals

Question

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

Accepted Answer

If a bulb B and AC source are connected in series with self-inductance coil, then in such case the brightness of the bulb decreases when an iron rod is inserted in the coil which further increases impedance of the circuit.

Answer

a capacitance of reactance X
C
= X
L
is included in the same citcuit.

Answer

an iron rod is inserted in the coil.

Answer

frequency of the AC source is decreased.

Answer

number of turns in the coil is reduced.

AC fundamentals

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

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