# Capacitor and AC

If i connect 2 capacitors in series with an AC source ,and an output ,then how exactly will the phase vary with input source ?

A single capacitor makes a 90 degree phase difference with the current,if I don't want that ,what steps can I can take to change the phase difference to 0 ?

anorlunda
Staff Emeritus

Two linear components in series with impedance Z1 and Z2 behave like a single component with impedance Z1+Z2. Where ##Z=R## or ##Z=j\omega{L}## or ##Z=\frac{1}{j\omega{C}}##, so that is an uninteresting question.

How do you make the phase difference between V and I zero? Make the impedance Z all real, as with a resistor.

You should ask yourself the same question about your bank balance. If you make deposits, then withdrawals in a sinusoidal manner, then the bank balance will vary sinusoidally but 90 degrees out of phase with the account balance. It is the same with electric current versus voltage in L and C.

cnh1995
What exactly are you trying to do? Is this about filtering signals, or power factor correction?