At what frequency does a 0.50 H inductor have a reactance of 100 Ω?
Correct answer B. 31.8 Hz
Explanation
From X_L = 2πfL, f = X_L/(2πL) = 100 ÷ (2π × 0.50) = 31.8 Hz. Dropping the 2π gives 200 Hz.
Answer checked How we write and check questions
Discussion