All Questions
13 questions
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Calculating capacitor voltage with initial conditions in an RC circuit
If the initial voltage of the capacitor at 0s is 20V, would the equation for the voltage of the capacitor at a specific time be; 60 + (20-60)e^(-t/RC)
or would it be 80 - 60e^(-t/RC)
- 55
3
votes
2
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817
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Transient analysis of a marx generator
I wanted to mathematically find the voltage on all capacitors in a Marx generator circuit. I thought that each capacitor would be charged like its own RC charging circuit. I came up with these ...
- 191
0
votes
1
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89
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What happens to the steady state of the series RC circuit if changes happen to any circuit element?
The question that I'm trying to understand is the following:
In any series RC circuit that is in steady state, WHEN any of the
elements changes (R, C, or applied voltage), the following will happen ...
- 317
2
votes
1
answer
223
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RC Circuit Transient Response
I was going through some questions on Transient Response of circuits. Then I encountered this question! Though, I was a bit confused at first, I initially approached in an intuitive way. My first ...
0
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2
answers
2k
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What is the voltage across the capacitor 3ms after the switch is closed
I have this circuit:
This circuit is working for a long time like this, with the switch open. So, the circuit is stabilized and the voltage across the capacitor is 40V.
At t=0, the switch is closed.
...
- 847
0
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2
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180
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Capacitor Voltage during Transients
I am starting to learn transient analysis series RC which requires our own equations to be derived, but I don't understand how the voltage across the capacitor is given in the equation below from a ...
- 1,583
0
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1
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3k
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how do i know if Vc(0+) or Vc(0-) is zero?
i mean like in this picture, why is Vc(0-) = 10 v? why isnt it =0? when do i decide that there exists a voltage there even though it was in steady state? im not completely getting it.
- 55
0
votes
2
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551
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Derivation of time constant for single source, single capacitor RC circuit
Take a circuit comprised of resistors, a single capacitor, and a single step response voltage source. Then:
Every single voltage and current in the circuit, except at the voltage source, will have a *...
- 113
0
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0
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336
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Transient analysis initial conditions in book
There is an example in Book:
Why is \$V_R = 5i_R\$? I can't see that.
more info:
- 385
0
votes
0
answers
220
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Calculating the time constant for an RC circuit
I have this circuit where \$C1 = 2~\mu F, C2 = 4~\mu F, R1 = R2 = 1~\Omega \$. Here, I want to calculate the time constant of the following circuit.
I calculated the equivalence resistance and ...
- 101
3
votes
1
answer
399
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Determining the surge duration of a double exponential transient?
I am trying to calculate the maximum single peak pulse power rating of a thick film resistor that will be subjected to a significant amount of inrush current upon each power up.
The datasheet has a ...
- 41
1
vote
2
answers
1k
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AC analysis of a circuit including variable resistors
I have a problem concerning the AC analysis of a simple circuit, containing variable resistors (each variable resistor is a pressure sensor). I am sure this is quite simple, but I have never worked on ...
- 111
0
votes
1
answer
479
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Spice definition of resistor/capacitor
I am trying to understand a Spice definition of a circuit and transient analysis on it. I have kind of "inherited" this and can't ask the original creator; my Spice memories from university are pretty ...
- 143