/sci/ - Science & Math » Thread #13354824

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Circuits

Anonymous Sat 03 Jul 14:38:53 2021 No.13354824 View Reply Original Report

Quoted By: >>13354835 >>13354865 >>13354914

Is it normal for my capacitor to behave like this?
No Current flows through it, exept at the beginning there's only one small charge.
Shouldn't there still flow some Volt through it?

Anonymous

Anonymous Sat 03 Jul 2021 14:41:13 No.13354835 Report

Quoted By: >>13354844

>>13354824
I hate LTSpice.
That is all.

Anonymous

Anonymous Sat 03 Jul 2021 14:42:32 No.13354844 Report

Quoted By: >>13355082

>>13354835
Me too but it's free

Anonymous

Anonymous Sat 03 Jul 2021 14:53:30 No.13354865 Report

Quoted By:

>>13354824
If I’m looking at this correctly, V1 is 20V every 5s, causing Q1 to “close” and pass 10V (from V2) through C1.

Assuming the sources are DC (which they look to be), and knowing capacitors behave as open circuits in DC at steady state, I can tell that C1 is charging up between 0 and ~10ms, then rolling into steady state (0V). Where exactly is node 7 and what is it measuring across for references?

I bet if you scrolled over to 5s on your graph, you’d see a discharge curve, then at 10s you’d see the exact same graph again..it’s been a while since I’ve used LTSpice though.

Anonymous

Anonymous Sat 03 Jul 2021 15:09:56 No.13354914 Report

Quoted By:

>>13354824
>No Current flows through it
unless you are considering leakage current, ideally caps don't conduct

>Shouldn't there still flow some Volt through it
volts don't flow. for circuits, voltage is the amount of energy a charge picks up from going from one point to another. thus you talk about voltage differences.
a good way to think of voltage is the elevation of a topo map.

current is the flow of charge. think of charges as little balls that are rolling around, and their motion creates a current. going back to the topo map analogy, charges would roll around in response to changes in elevation

Anonymous

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Anonymous Sat 03 Jul 2021 16:19:22 No.13355082 Report

Quoted By:

>>13354844
Not as in freedom.

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