Question on: JAMB Physics - 1999
At what frequency would a 10H inductor have a reactance of 2000Ω?
A
π/200Hz
B
π/100Hz
C
100/πHz
D
100πHz
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Correct Option: C
Inductive reactance XL = 2πfL
∴ 2πfL = 2000Ω
then f = 2000Ω/2 x π x 10
f = 100/πHz
∴ 2πfL = 2000Ω
then f = 2000Ω/2 x π x 10
f = 100/πHz
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