Question

What is the phase angle between the voltages of the inductor and capacitor in a LRC series circuit?
a)45 deg
b) 0
c) 90 deg
d) 270 deg
e) 180 deg

Answer 1

I think is 180. Can u explain me why?

Answer 2

The applied voltage has three components:
1.Vr = IR, across the resistance R and in phase with the current I.
2. Vl = I * omega L across the inductor L, leading the current by 90 degrees.
3. Vc = -I/omega C across the capacitor C, lagging 90 degrees behing the current.
As can be seen, Vl and Vc are 180 degrees out of phase, with their vectors lying in a straight line.