Question

The reactance at a circuit Is zero. it Is possible mat me circuit contains

• A. an inductor and a capacitor
• B. an inductor but no capacitor
• C. so a capacitor but no inductor
• D. neitherr an inductor nor a capacitor

Answer 1

Answer: (A), (B)

The correct options are
A an inductor and a capacitor
B an inductor but no capacitor

case-1; Inductor and capacitor

$Z=\omega L-\frac{1}{\omega C}$

it can be zero when

$\omega L=\frac{1}{\omega C}$

$\omega =\frac{1}{\sqrt{LC}}$

case-2; Inductor but no capacitor

As we know when current flow through circuit contains inductor it resists current in starting with infinite resistance but with time its resistance decreases and after some time it does not resist so reactance will become 0.