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Results tagged with circuit-analysis
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user 29434
Circuit (Network) analysis is the process of finding the voltages across, and the currents through, every component in the network. Consider using in conjunction with tags for the particular analysis technique(s) in question: "nodal-analysis", "mesh-analysis", "superposition", etc.
1
vote
Instantaneously changing currents in RL circuit
We are talking about the mathematical models used to model a lumped-element network.
In this context any current can change instantaneously, unless there is a reason it can't. The reason why \$i_L\$ …
2
votes
How to find potential difference at A
Another approach is to take each one of the branches with batteries and substitute them with their Norton equivalent, i.e. a \$5\Omega\$ resistor in parallel with a \$ \dfrac{2V}{5\Omega}=0.4A\$ curre …
1
vote
Passive Convention Specifics With Regards to Resistors (Problem linked)
The reference directions of currents and the reference polarity of voltages across circuit elements is completely arbitrary and independent of each other (for sake of uniformity I'll talk about refere …
3
votes
Accepted
Calculation of a voltage in a single mesh circuit
Another way to skin this poor cat!
Using Kirchhoff's voltage law (KVL) and Ohm's law you can write the following equation, where \$i\$ is the current in the mesh (clockwise direction):
\$
v_1 - R_1\ …
1
vote
Accepted
Quick question about phase displacement in AC circuits
This can be solved using the data you have without any assumption, if (and this is not clear from what you said) the only thing you have to find is the active power provided by the voltage source, i.e …
4
votes
Accepted
Analyzing resistive circuit with ideal diodes
Just for the benefit of the larger audience: when you deal with purely resistive circuits containing n ideal diodes you can analyze them by guessing the state of every diode (either ON or OFF), do the …
0
votes
How do I find the power of this circuit?
\$I_1\$ is an independent current source, this means that the current in the circuit is forced by that source to be \$2A\$ in clockwise direction. This means that the voltage across the current source …
3
votes
What is wrong with this circuit analysis?
Other people gave explanations on why your model is flawed and hence produces weird results.
I'll give you a mathematical explanation, instead.
TL;DR:
Simply put, you applied superimposition in a su …
4
votes
Accepted
thevenin dependent source finding Rth
This is one of those pesky cases where the standard procedure for finding the open circuit voltage or the short circuit current leads to "funny" results.
Another way to compute the Thevenin equivalent …
1
vote
Accepted
Energy absorbed by the condenser
First of all you have your energy formulas wrong!
\$E_C(t) = \dfrac 1 2 C \, v_C^2(t) \$
and
\$E_L(t) = \dfrac 1 2 L \, i_L^2(t) \$
But this inconsequential.
Your error lies in the integration, b …
2
votes
What is the purpose of R3 in this LED driver circuit?
It appears that you took that image from the book "The Art of Electronics", 3rd edition (figure 2.16B). When taking images from books, as for other copyrighted sources, you should cite the source.
Any …
0
votes
Dependent current sources in Thevenin equivalent
There are different methods to determine the Thèvenin equivalent impedance ZTH.
ZTH can be found using what the theorem explicitly says, i.e. calculating the ratio between the open circuit voltage and …
2
votes
Accepted
Calculation of a voltage in the frequency domain
The current source doesn't influence the circuit after the switch has closed because all the current it provides will flow through the switch itself, therefore it is not useful to the computation of \ …
0
votes
Help with finding current in ab line
Your drawing is not very clear. If by A and B you mean those points at the extremes of your circuits extending out like two terminal to the outside world, then you can't.
You can't because the curren …
1
vote
How actually an integral transformation(Fourier and Laplace) works?
Well, from what you say it is not clear what you mean by "how the transform works", since you don't want a mathematical explanation. How transforms work is something mathematical.
Anyway, I guess yo …