Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Hello
I want to simulate a circuit which has both variable capacitor and resistor right after changing the capacitor, resistor or both.
I will appreciate if you could help me in finding the general equation.
I have attached the circuit.
Thanks
The voltage across the capacitor will increase as its capacitance is decreased (and vice-versa) due to conservation of charge.Your circuit shows a DC supply source, so the variable capacitor will have no effect.
Of course, over time, the voltage across the capacitor will revert to the same value as before you changed the capacitance as it charges/discharges to the voltage at the junction of R1/R2.
Hello dougy83 and ericgibbs
Thanks for your responses. Here I have a DC input voltage. Please see the attached View attachment 75812
I know if we have a variable resistor (case (a)), the response would be the same as (a). but I am wondering in what case I would have a response like case (b) maybe having just variable capacitor or both variable capacitor and resistor. I want to find response time and Vp. But as ericgibbs said maybe the variable capacitor has no effect in the response.
thanks in advance for your responses.
Morteza