Question

The current graph for resonance in LC circuit

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

In LC circuit, if $X_L=X_C$ then $\omega =\frac{1}{\sqrt{LC}}$
$I_0\infty$ , So $Z=\frac{E_0}{I_0}=0$
As $\frac{1}{\sqrt{LC}}$ is the natural
frequency of $LC$ circuit, therefore for an $LC$ circuit if the frequency of applied $AC$ becomes equal to the natural frequency of an $AC$ circuit then the amplitude of current becomes infinite due to zero impedance.