Voltage across a capacitor

1. Feb 2, 2004

Ed Quanta

How do you calculate the maximum voltage across a capacitor in an L,R,C series circuit?

2. Feb 3, 2004

TillEulenspiegel

It depends on the input current, is it AC or DC?

If DC then Vc=Vcc (V across cap=supply )
If AC then it depends on the Fq of Vcc and the impedance of the LRC circuit. ( which is a characteristic of thier respective values)
Where: Z= Sqrt (R^2 * ((Xl-Xc) ^2))
WhereXl is inductive reactance and Xc is capacitive reactance

The answer will be a point in time of a value that changes over time. In other words since Vcc varies over time (Fq) so will the voltage over time.

Last edited: Feb 3, 2004