The inductive reactance of a 20.0-mH inductor at a certain frequency is 120 Ω. What is the frequency in Hz?
A) 120 Hz
B) 167 Hz
C) 478 Hz
D) 6000 Hz
E) 955 Hz

Question

Quizplus · Accepted Answer

The inductive reactance of an inductor is given by the formula:

XL = 2πfL

where XL is the inductive reactance in ohms, f is the frequency in hertz, and L is the inductance in henries.

So, we can rearrange the formula to solve for f:

f = XL/(2πL)

Substituting the given values, we get:

f = 120 Ω/(2π × 20.0 mH) ≈ 955 Hz

Therefore, the answer is E.

The Inductive Reactance of a 20