Recent content by Simpcar

Thank you very much for your time and for all you wrote! One last question, could you tell me the convention used in this case to make it work, please?

If I use KVL in the circuit I sketched, I get that the voltage across the capacitor must be the same as the voltage across the resistor V_C=V_R hence V_C-V_R=0 \to q(t)/C - I(t) R=0. Am I wrong? How can I 'see' the other current you talk about and what causes it? Could you add it in my sketch...

I can't disagree with you all, but I still don't understand the choice of a negative I(t) . As sophiecentaur says we have to believe in maths but if so, why should we put a negative sign? A derivative is just a mathematical tool that expresses the change of something, and as such, it has an...

Doesn't it lead to an increase of charge in the circuit and an equivalent decrease in the capacitor?

Hi everyone! I'm trying to understand why when writing the differential equation of a discharging RC circuit V_C-Ri(t)=0 \to q(t)/C - Ri(t)=0 we replace i(t) with -\frac{dq(t)}{dt}. I read many threads but I don't understand the physics behind this. The usual answers I read are something like...

Hi! I'm Simone (pronounced as see-MO-ne) from Italy and I'm an undergraduate student of physics. Nice to meet you all!