A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors. It may be driven by a voltage or current source and these will produce different responses. A first order RC circuit is composed of one resistor and one capacitor and is the simplest type of RC circuit.
RC circuits can be used to filter a signal by blocking certain frequencies and passing others. The two most common RC filters are the high-pass filters and low-pass filters; band-pass filters and band-stop filters usually require RLC filters, though crude ones can be made with RC filters.
I recently got these electrical experiment boards to do some experiments but I am new to doing experiments with such boards. Can someone help? Thanks in advance
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Hello everyone.
I am having some trouble with an RC phase shift oscillator that I built as a hobby project. I am completely stuck on this and I just cannot figure it out. My oscillator is not oscillating.
Here is the circuit that I am trying to get to work. Taken from...
Here, at voltage source zero crossing,
cos(2to + pi/4) =0.
So, 2to+pi/4 = pi/2
This gives to=pi/8 = 0.3926s.
But the given answer is twice the answer I got i.e. 0.7852s.
Have I missed anything here?
Homework Statement
Question 6.
Homework Equations
Time constant = RC
The Attempt at a Solution
I think answer should be 1/2 RC as Rnet = 1/2R and to convert it to single resistance form we should first find Rnet
But the answer is coming out to be RC . How?
<< Corrected Image added by...
Homework Statement
Homework Equations
The Attempt at a Solution
So you need to find the voltage across node D while the capacitor is charging, so it is going to be related to the voltage of the capacitor, so a function of time, so you need to come up with the equation for Vc(t), which I...
Homework Statement
In Fig. 27-66, R1= 10.0 kΩ, R2 = 15.0 kΩ, C = 0.400 µF, and the ideal battery has emf E = 20.0 V. First, the switch is closed a long time so that the steady state is reached. Then the switch is opened at time t = 0. What is the current in resistor 2 at t = 4.00 ms?
This is...
Homework Statement
At initially, the switch is open meaning there is no current flowing. So how does the capacitor is initially charge to -5V? and what does a negative voltage capacitor means?
I thought it is only when the switch is closed (t=0) that when the capacitor is being charged...
Homework Statement
Hi, I've run into two different equations for the voltage of a typical RC circuit, one resistor, and one capacitor.
Please explain the different between the two. One has a 1 - the natural log and the other one doesnt.
Homework Equations
1. V(t) = Vo*e^(-t/RC)
2. Vc =...
Homework Statement
[/B]
Derive an expression for vc(t) in the circuit of Figure P4.13 and sketch vc(t) to scale versus. I attached a screen shot of the circuit for this problem.
time.
Homework Equations
V = IR
V = V0exp(-t/tau)
The Attempt at a Solution
[/B]
I am trying to find the...
Homework Statement
The circuit in the figure below has been connected for a long time. Let R1 = 8.20 Ω and R2 = 4.40 Ω.
(a) What is the potential difference across the capacitor?
(b) If the battery is disconnected from the circuit, over what time interval does the capacitor discharge to...
Homework Statement
In the circuit of the figure below, the switch S has been open for a long time. It is then suddenly closed. Take = 10.0 V, R1 = 56.0 kΩ, R2 = 200 kΩ, and C = 14.5 μF.
(a) Determine the time constant before the switch is closed.
(b) Determine the time constant after the...
Homework Statement
Hello everyone, I am trying to figure out how to approach part c, parts i and ii
Homework Equations
OK. I know that we have the current equation in milliamps as shown above
The Attempt at a Solution
My problem is giving one possible explanation for the finding and...
In a RC circuit is voltage through a capacitor always consider negative no matter if you're going with or against the current when setting up a voltage equation?
Homework Statement
Find Vc(0)
Homework Equations
Nodal Eq , ohms law
The Attempt at a Solution
Can someone please check my work for Vc(0)? I'll appreciate it.
Homework Statement
2. Homework Equations [/B]
KCL, Node Analysis , Mesh Currents
The Attempt at a Solution
Hi, in part b when t>0 the capacitor is replaced by an open circuit , however in part c the capacitor is replaced by a short circuit why is that?Aren't inductors the only ones...
Homework Statement
For my lab class my professor wants us to graph the theoretical amplitude of the output from a low-pass filter vs. frequency. I have the resistance and capacitance that I chose for the RC circuit and a V(in). Is there an equation that I should be able to use to relate these...
Homework Statement
I am trying to find the capacitor voltage in the following picture:
Find i(t) in the figure below. Assume dc steady state conditions are valid for t<=0.
Homework Equations
i=c(dv/dt)
KCL
The Attempt at a Solution
At t<0 I found Vc to be 8 volts which should be correct...
Homework Statement
Hello, long story short: I need to create a model of Li-Ion battery and I'm stuck on calculating the battery equivalent internal impedance. The thing is, I don't know the equation or even how to make one. However, I have a circuit drawing:
Homework Equations
Values in...
Homework Statement
This isn't so much of a problem itself but I found it interesting that on the All About Circuits website, two of the questions give a phase angle for impedance as opposite the angle of current. I understand the current is 90 degrees out of phase with voltage in both RL and RC...
1. Situation and Variables:
A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 30 Ω, R3 = 66 Ω and R4 = 113 Ω. The capacitance is C = 64 μF and the battery voltage is V = 12 V. The positive terminal of the...
Homework Statement
A potential difference of V = 38.0 V is applied across a circuit with capacitances C1 = 4F, C2 = 5F, and C3= 2F, as shown in the figure.
What is the magnitude and sign of q3l, the charge on the left plate of C3 (marked by point A)?
What is the electric potential difference...
https://qph.is.quoracdn.net/main-qimg-c22d8aa4be4fc2ed9b2f1c7060982e04?convert_to_webp=true [Broken]
How to find value of U on R2 long time after switch is being closed?
Capacitors are charged so there is no current going through? Or?
I used kirchof rule so i get
Uo+Uc1-U=0
U=Uc1+Uo...
Homework Statement
Hi there. I have a simple RC circuit with a battery voltage of 10 V, R = 1 Ω, C = 1 F and a switch. I want to use the Explicit Euler (forward divided difference) to solve the equation and check for stability, rather than using a ODE. I am finding the equation for when the...
Homework Statement
Suppose an RC series circuit has a variable resistor. If the resistance at time t is given by by R = a + bt, where a and b are known positive constants then the charge q(t) on the capacitor satisfies
(a+bt) q' + (1/C)q = V
where V is some constant. Also q(0) = q_0
Find q(t)...
Edit: sorry i realized i posted this in the wrong section. Can some move it to hw? Thank you.
Hey i was studying intro E&M recently and i started learning about RC circuits. Up until this point everything, concept wise, has made sense for me. Then I learned how RC circuits work, and the math...
Homework Statement
Calculate the voltage, current, and power across the two resistors for every second of run 1 in the RC circuit.
The RC Circuit:
The settings of the circuit:
The Graph. The capacitor is charged until it reaches 5.0 V and then discharged until it reaches 1.0 V. This...
Hi everyone. I have a problem with my device. It consists of a parallel plate capacitor with plates made of galvanized iron. Each plate's area is 1mx1inch. It's connected to a bleeder resistor and basically, the circuit is just a simple RC circuit. The source I'm using is a constant 5V DC...
Homework Statement
All information is given in the picture posted
Homework Equations
V=IR , Q=CV
The Attempt at a Solution
What I don't understand is , when the capacitors are initially uncharged , they should just be treated as wires , if this is the case , then the entire circuit is...
Homework Statement .
[/B]
This is problem 7.45 in Fundamental of Electric Circuit 5th edition.
2. Homework Equations
First off, I want to go ahead and say that I don't need the solution I already solved it.
I went ahead and used Nodal analysis when Vs = 30. I placed a node voltage right...
1. Homework Statement
The switch is closed. Graph the current in R_{1}
2. Homework Equations
V = IR
CV = Q
3. The Attempt at a Solution
1) R_{0} can be ignored
a) The resistor simply reduces the voltage before any current can be split.
b) We're justified, as a result, in...
Homework Statement
A voltage source given by ##v_s(t)=25cos(2\pi\times10^3t-30^\circ)## is connected to a series RC load. If R = 1MOhm and C = 200pF, obtain an expression for ##v_c(t)##, the voltage across the capacitor.
Answer known to be: ##v_c(t)=15.57cos(2\pi\times10^3t-81.5^\circ)##...
So I am awere of everything in electromagnetism in physics,but lately I am enjoying in creating RC cars.But I only got to making a car going only forward,how can i make him turn?How could I transform only a part of the electrical energy into mechanical so that my RC car can turn left and right...
Homework Statement
In each of the four circuits shown,
an AC input voltage, ##V_0 cos(\omega t)## is applied on the
left and the output voltage is measured on the
right. Treat the input frequency as a...
Homework Statement
There is a circuit with a battery of voltage V and resistor R, then splits into two branches one with a capacitor C, and one with a resistor 2R.
The answers for the questions can only depend on R, C, V, and t.
When a switch only allows current to flow through the capacitor...
Find the potential of point a with respect to point b in the figure (Fighttps://s.yimg.com/hd/answers/i/1ffe0f8aeaf145679cde38f7812b1c7f_A.png?a=answers&mr=0&x=1413484693&s=0943630e47eb74ae023909f7d39f74e3 [Broken] ure 1) .
If points a and b are connected by a wire with negligible resistance...
Homework Statement
part 1 Consider the circuit of figure G, where R1=20 ohms R2=10 ohms X1=37.7 ohms X2=-53.1 ohms. Compute the current and the phase angle between the current and the applied voltage. In the figure R1 is in series with X1 and R2 and X2 are in series. R1 and X1 are in parallel...
Homework Statement
I'm supposed to find the current in a circuit with a voltage source, capacitor, and resistor in series. The voltage source is described by V=V0ejwt.
Here, j is the complex number j2=-1, and i is the current
Homework Equations
I=C*dv/dt
The Attempt at a Solution
I have...