Recent content by marsupial

Thanks Bill, I appreciate it. We did cover solving circuits using differential equations earlier, this question was in a section of the textbook on using laplace transforms to solve it, so that's why I was focusing on that. What was mystifying me was how they got the 5mA for the current, and the...

Thank you. I can stop tearing my hair out now :-)

Thank you. But how did they get the initial current of 5mA? I would have thought it was 1mA, as used in the s-domain circuit?

Homework Statement The switch in the circuit in has been closed for a long time. At the switch is opened. a) Find i0 for t>=0 (b) find v0 for t>=0 I don't understand the effect of the switch in the position it is in. It's acting as a short circuit, I think, so presumably the capacitor doesn't...

##i_\sigma## was given as an incoming current in the diagram they supplied (the first diagram - I only added currents to the second). I see I wrote the polarity wrong for the 100 ohm resistor. But even with that change I didn't get the correct answer (using the KCL I gave). If the polarities...

I do see how it reflects what you are saying, but we were taught to do it this way and the answer in the pdf I found online also drew the current as exiting the v_1 node. I would just like to understand how it works that way too. Also, in an example we had in our lecture notes, where there was...

Can someone help me understand why what I did was incorrect and the reasoning behind the correct approach to the dependent voltage source? If I've drawn the currents the correct way, it appears they have ## \frac{150i\sigma - v_1} {50}##

Homework Statement Here is a diagram of the circuit and my redrawing with currents drawn: We are to find the power delivered by the dependent voltage source. I found a solution online, but I am not sure why they had the KCL line as: $$ \frac{v_1 - 160} {10} + \frac{v_1} {100} + \frac{v_1...

i found the answer, thanks.

Homework Statement I will post a photo of the question in the thread once I've created it. I have found the magnitude and angle of the resultant force, but I am unsure of how to proceed. I find moments and couples confusing. Homework Equations $$\vec M = \vec r \times \vec F$$ The Attempt at...

Thank you, that makes so much more sense. I was wondering how to embed images too :-) I had tried in the post but it didn't work.

Homework Statement My question is about the following circuit: https://ibb.co/hWnb9v According to the answer, it is an invalid circuit as the voltage drop on the left totals 14V and on the right totals 16V, and they have to be the same between any two terminals. I understand that it has to be...

Thank you. I think given the rest of the question it was an error. Going through it helped clear up some of my misconceptions and helped with my general understanding though, so I am grateful for the responses. I really appreciate this forum!

It would be supplying power. Thank you so much for your help, it makes sense now.