passwella.
Menu

JAMB Physics 2004 Question 22

Question 22

Alternating Current Circuits

In a tuned radio receiver R, L, C series circuit for resonance, the inductive and capacitive reactance XL and XC respectively are related as

  1. A.XL = 1/XC
  2. B.XL = ½XC
  3. C.XL = XC
  4. D.XL = 2XC
Show the answer and explanation

Answer: C (XL = XC)

Explanation

At resonance the inductive and capacitive reactances are equal and cancel, so the impedance is just R.