In a laboratory experiment a student connects a resistor

PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current

Problem

R=50\,\Omega

, an inductor

L=0.20\,\text{H}

and a capacitor

C=80\,\mu\text{F}

in series to an a.c. source having a peak emf of

100\,\text{V}

. (i) Calculate the resonant frequency of the circuit. (ii) Find the peak value of current at resonance. (iii) Determine the peak current when the supply frequency is

1.5

times the resonant frequency. (iv) Compare the results of parts (ii) and (iii) and state which current is larger, giving a brief reason based on circuit parameters.

Related theory

AC Circuit Analysis
Resonance in AC Circuits
Alternating current
Series LCR circuit

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