What is Rlc: Definition and 443 Discussions

An RLC circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel. The name of the circuit is derived from the letters that are used to denote the constituent components of this circuit, where the sequence of the components may vary from RLC.
The circuit forms a harmonic oscillator for current, and resonates in a similar way as an LC circuit. Introducing the resistor increases the decay of these oscillations, which is also known as damping. The resistor also reduces the peak resonant frequency. In ordinary conditions, some resistance is unavoidable even if a resistor is not specifically included as a component; an ideal, pure LC circuit exists only in the domain of superconductivity, a physical effect demonstrated to this point only at temperatures far below and/or pressures far above what are found naturally anywhere on the Earth's surface.
RLC circuits have many applications as oscillator circuits. Radio receivers and television sets use them for tuning to select a narrow frequency range from ambient radio waves. In this role, the circuit is often referred to as a tuned circuit. An RLC circuit can be used as a band-pass filter, band-stop filter, low-pass filter or high-pass filter. The tuning application, for instance, is an example of band-pass filtering. The RLC filter is described as a second-order circuit, meaning that any voltage or current in the circuit can be described by a second-order differential equation in circuit analysis.
The three circuit elements, R, L and C, can be combined in a number of different topologies. All three elements in series or all three elements in parallel are the simplest in concept and the most straightforward to analyse. There are, however, other arrangements, some with practical importance in real circuits. One issue often encountered is the need to take into account inductor resistance. Inductors are typically constructed from coils of wire, the resistance of which is not usually desirable, but it often has a significant effect on the circuit.

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  1. M

    A Little Bit of Guidance on this RLC Circuit (Please )

    I've been working on this problem to review (see the attachments), and my circuit analysis skills are quite rusty. I've determined that the circuit should be underdamped, and it will have a step response. Based on this, I'm using the equation V0(t)=Vf+B1e^(αt)cos(ωdt)+B2e^(ω0t)sin(ωdt). As you...
  2. M

    Ideas for a Basic RLC Related Class Project

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  3. T

    RLC Circuit with damping question

    I have an RLC Circuit. I've changed the resistors 3 times to give me a case of overdamping, underdamping, and critical damping. In taking my data (this was a long long time ago) I apparently missed taking measurements of current. I'm trying to solve the three differential equations to make a...
  4. T

    RLC Circuit with damping questions

    I have an RLC Circuit. I've changed the resistors 3 times to give me a case of overdamping, underdamping, and critical damping. In taking my data (this was a long long time ago) I apparently missed taking measurements of current. I'm trying to solve the three differential equations to make a...
  5. R

    Solving Series RLC Circuit Problems: Input/Output Equations & Diagram

    Please help me to solve this RLC circuit problem. I am completely confused.If you give me the direct answer it would be much appreciated. For the series RLC circuit in Figure, find the input/output difference equation for 1. y(t)=v_{R} 2. Y(t)=i(t) 3. y(t)=v_{L} 4. y(t)=v_{C} I...
  6. M

    Impulse function applied to RLC circuit

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  7. S

    Driven RLC circiut in parallel

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  8. B

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  9. E

    Engineering Difference equation of simple RLC Circuit

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  10. F

    Engineering Find Resonant Freq, Q, Power Diss pwr Half Pwr Freq in RLC Circuit

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  11. W

    Uncharging RLC circuit, critical & overdamped case

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  12. P

    Energy of fields caused by RLC circuits

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  13. S

    How do I correctly position A1 and A2 in overdamped parallel RLC circuit?

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  14. L

    Just one little question on the frequency band of the series RLC filter

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  15. L

    Series RLC filter (trap filter)

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  16. I

    Solving RLC Circuit Problem: Underdamped CKT Roots

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  17. B

    Proof of an expression concerning an RLC circuit

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  18. Cyrus

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  19. B

    Solving an RLC Circuit: Seeking Help to Begin

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  20. B

    Can Oscilloscope Measurements Show Resistance Impact on RLC Circuit Damping?

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  21. C

    RLC Damped Oscillator: Why Quicker to Zero in Critically Damped Case?

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  22. B

    What Frequency Makes Currents Equal in an RLC Circuit's Inductor and Resistor?

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  23. B

    Engineering Electrical engineering, RLC circuit

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  24. D

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  25. F

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  26. P

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  27. D

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  28. J

    Engineering Calculating Frequency in RLC Circuits with Gradual Decay

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  29. S

    Phasor Diagrams of Series Parallel RLC circuits

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  30. T

    How Do You Calculate RLC Circuit Parameters and Half-Power Frequencies?

    I find this question very hard and i could not work out the answers, i have looked on the internet for forumals but they don't seem to work ?? Anyone got any methods to work through the question ? I found a website that is about RLC series circuits but looking into it, it really confuses me...
  31. D

    What Are the Correct Calculations for Reactance in a Parallel RLC Circuit?

    Hey im in first year electronics and have a problem with a parallel rlc circuit im trying to find the reactance (Xc and Xl) for a circuit that has a 500 ohm resister and a .01 microfarad capacitor in parallel with a 500 ohm resistor and a .5 mH inductor. The frequency of the circuit is 50...
  32. D

    Engineering How Do You Calculate Reactance in a Parallel RLC Circuit?

    Hey im in first year electronics and have a problem with a parallel rlc circuit im trying to find the reactance (Xc and Xl) for a circuit that has a 500 ohm resister and a .01 microfarad capacitor in parallel with a 500 ohm resistor and a .5 mH inductor. The frequency of the circuit is 50...
  33. B

    How Do Component Substitutions Affect RLC Circuit Properties?

    We were given a question to produce a RC circuit. I can do those just fine. Now we don't have to actually produce a RLC circuit. My professor asked us this question "What is the analogous problem when we take instead of capacitors either resistors or inductor? Describe in words the changes in...
  34. D

    Solving RLC Circuit with 2 500pF Capacitors and 80mH Inductor

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  35. H

    RLC circuit and rate of increase of current

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  36. A

    Question about RLC circuits

    A person is working near the secondary of a transformer, as shown in the figure below. The primary voltage is 120 V at 60.0 Hz. The capacitance C, which is the stray capacitance between the hand and the secondary winding, is 10.0 pF. Assuming that the person has a body resistance to ground R...
  37. A

    Calculating RLC Circuit Damping Time and Energy Loss

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  38. Y

    What is the resonance frequency expression for a parallel RLC circuit?

    What is the resonance frequency expression for a parallel RLC circuit? I know that for a series RLC circuit, it is: w=\frac{1}{\sqrt{LC}} Is it the same for a parallel RLC circuit? I remember reading somewhere that it was not exactly the same, although it approaches the series RLC...
  39. F

    What Happens to Voltage in a Parallel LRC Circuit with a DC Source?

    quick question about RLC circuits... Okay guys and gals... I know this is a rather dumb question, but I don't have a lot of reference material where I am at currently (I am in Kuwait as part of Operation Iraqi Fredom)...so if someone could give me an answer I would appreciate it... I...
  40. L

    Archived Power factor at half power points for RLC circuit

    Can anyone help me with this homework problem? I worked it through, but the answer i get doesn't agree with the answer the book gives. I'll include my work, and if anyone can help, I'll be eternally grateful, at least for a while. The Problem: In a series RCL circuit the dissapated...
  41. F

    Power dissipated in RLC circuit

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  42. I

    RLC circuit inductor/capacitor combined voltage?

    RLC circuit inductor/capacitor combined voltage?? I have an RLC circuit. I understand that the combined sum of the voltage magnitudes across the three components will be greater than the signal generator. I don't understand, however, why the combined voltage across the inductor and the...
  43. D

    Solve RLC Series Circuit: Find Vrms, Power Factor & Draw Phasor

    I just finished an exam and this problem gave me fits. It seemed simple enough when I first looked at it, but it took me a while to come to the following conclusions which I'm not sure are correct. The problem had an RLC series circuit with source of 141.4 Volts peak and a frequence of 1...
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