Question

An a.c. source of frequency 50 Hz is applied to a series circuit of resistance 20Ω , an inductance of 100 mH and a capacitance of 30μF . Does the current lag or lead the applied voltage? If so, by what (phase) angle?

Answer 1

Here inductive reactance XL = ωL

Thus X_C > X_L . Hence the current leads the applied voltage by an angle ϕ where