Solving time: 4 mins
Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80 μF, R = 40Ω.
(a) Determine the source frequency which drives the circuit in resonance.
(b) Obtain the impedance of the circuit and the amplitude of current at the resonating frequency.
(c) Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the resonating frequency.
Text solutionVerified
(b)
At resonance,
The peak voltage,
(c)
Potential drop across inductor,
Potential drop across capacitor,
Potential drop across resistor,
Potential drop across the LC combination
= (-)
at resonance =
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Practice more questions from Physics Part-I (NCERT)
(a) Determine the source frequency which drives the circuit in resonance.
(b) Obtain the impedance of the circuit and the amplitude of current at the resonating frequency.
(c) Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the resonating frequency.
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Question Text | Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80 μF, R = 40Ω. (a) Determine the source frequency which drives the circuit in resonance. (b) Obtain the impedance of the circuit and the amplitude of current at the resonating frequency. (c) Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the resonating frequency. |
Updated On | Nov 19, 2023 |
Topic | Alternating Current |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 Video solution: 5 |
Upvotes | 581 |
Avg. Video Duration | 10 min |