Phase Delay of capacitor's voltage

[kehler]

Does anyone know why increasing the frequency of a RC circuit increases the phase delay in the capacitor's voltage (with respect to the voltage of the source)?
I understand that the amplitude decreases because the impedance increases but I don't understand why the phase delay increases :S

Any help would be appreciated :)

 

[CEL]

Does anyone know why increasing the frequency of a RC circuit increases the phase delay in the capacitor's voltage (with respect to the voltage of the source)?
I understand that the amplitude decreases because the impedance increases but I don't understand why the phase delay increases :S

Any help would be appreciated :)

An RC circuit has a complex impedance that depends on frequency. As frequency changes, the modulus and phase of the impedance changes too.
Write the complex impedance and calculate both modulus and phase.