If the frequency of the e.m.f. source in the a.c. circuit illustrated below is 500/π Hz. What is the reactance of the inductor? by Sunday | Sep 1 | Physics WAEC | 0 comments A. 450 B. 0.9 C. 900 D. 567 E. 43 Correct Answer: Option C – 900 Explanation x = 2πfL=2π×500/π ×0.9 = 900Ω