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AC Circuits — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsAC Circuits1 Mark
MCQ
In $L C$ parallel resonance circuit, choose the wrong statement.
  • A
    At resonance, current is minimum.
  • B
    At resonance, impedance is maximum.
  • C
    Resonance occurs when inductive and capacitive reactance is same.
  • ✓
    At resonance, resonant frequency $=\sqrt{L C}$.
✓

Answer

Correct option: D.
At resonance, resonant frequency $=\sqrt{L C}$.
(d) : In $L C$ parallel resonance circuit, at resonance
$
\begin{aligned}
& X_L=X_C \\
& \Rightarrow \omega L=\frac{1}{\omega C} \Rightarrow \omega=\frac{1}{\sqrt{L C}}
\end{aligned}
$

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