At what frequency is the reactance of a 20.0 mH inductor equal to 18.8 Ω?
A) 75.0 Hz
B) 150 Hz
C) 1500 Hz
D) 15.0 Hz

Question

Quizplus · Accepted Answer

The reactance of an inductor is given by 
Xᴸ = 2πfL
where Xᴸ is the reactance of the inductor, f is the frequency of the signal, and L is the inductance of the inductor.

Setting up the equation with the given values, we get:
18.8 = 2πf(20.0 x 10^-3)
Solving for f, we get:
f = 150 Hz

Therefore, the answer is B.

At What Frequency Is the Reactance of a 20