The reactance of a circuit is zero. It is possible that the circuit contains:
A. an inductor and a capacitor
B. an inductor but no capacitor
C. a capacitor but no inductor
D. Neither inductor nor capacitor
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
Impedance of the circuit is given by $ Z = \sqrt{R^2+(X_C-X_L)^2}$
For Z to be zero R=0 and $X_C-X_L =0$
Hence the circuit has either
Both inductor and capacitor and $X_C-X_L =0$ or $ X_L = X_C =0$
The correct answer is Option (4) → A & D Only