Potential Difference Across an Inductor in an RLC circuit

[Senrab]

Homework Statement

An alternating source drives a series RLC circuit with an emf amplitude of 6.0V, at a phase angle of +30deg. When the potential difference across the capacitor reaches its maximum positive value of +5.00V, what is the potential difference across the inductor?

Homework Equations

Vc=IcXc, VL=ILXL

The Attempt at a Solution

I don't know because I don't know what to do with the phase angle.

 

[ehild]

The phase angle of 30° means that the voltage leads the current by that angle. That is also the phase of the complex impedance: (XL-Xc)/R = tan(30°)

ehild