Chapter 21 - AC Circuits - Learning Path Questions and Exercises - Exercises - Page 749: 20

a) $18.84Ohm$ b) $6.36A$ c) $90^{\circ}$

a) Inductive reactance = $2\times3.14\times f\times L=2\times 3.14\times 60\times 50 \times10^{-3}=18.84Ohm$ b) Current = RMS voltage / Impedance = $120/18.84=6.36A$ c) Phase angle be $\theta$, then $ tan\theta=\frac{X_{L}-X_{c}}{R}=infinity$, since R=0 thus $\theta=90^{\circ}$