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Resonance in RLC Circuit

25.A coil of ...

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25.A coil of self inductance L is connected in series with a bulb B and AC source. Brightness of the bulb decreases when 1)Number of turns in the coil is reduced 2)capacitance of reactance Xl=Xc is included in same circuit 3) Iron Rod is inserted in the coil. 4) Frequency of AC source is decreased

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

Q. An inductor L of inductance

X_{L}

is connected in series with a bulb B and an ac source. How would brightness of the bulb change when (i) number of turn in the inductor is reduced. (ii) an iron rod is inserted in the inductor and (iii) a capacitor of reactance

X_{C} = X_{L}

is inserted in series in the circuit. Justify your answer in each case

L

X_{L}

is connected in series with a bulb

B

to an A.C. source as shown in the figure. Briefly explain how does the brightness of the bulb change, when

(i) Number of turns of the inductor is reduced.

(ii) A capacitor of reactance

X_{C} = X_{L}

is included in the same circuit

(iii) If increase driving frequency

f

in the circuit, does the current amplitude

I

increase or stay the same?

Q. A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil, then

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Resonance in RLC Circuit

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