JAMB Physics 1999 Question 39

Question 39

Alternating Current Circuits

At what frequency would a 10 H inductor have a reactance of 2000 Ω?

  1. A.π/200 Hz
  2. B.π/100 Hz
  3. C.100/π Hz
  4. D.100π Hz
Show the answer and explanation

Answer: C (100/π Hz)

Explanation

XL = 2πfL, so f = 2000/(2π × 10) = 100/π Hz.