JAMB - Physics (2000 - No. 32)
A 2H inductor has negligible resistance and is connected to a 50/π Hz A.C. Supply. The reactance of the inductor is
200 Ω
50 Ω
100/π Ω
25/π Ω
Vysvětlení
Inductive reactance is given by
XL = WL = 2πfL
XL = 2 x π x (50/π) x 2
XL = 200Ω
XL = WL = 2πfL
XL = 2 x π x (50/π) x 2
XL = 200Ω