# NEET Physics Alternating Current Questions Solved

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency

(1) 2500 rad – s–1 and $5\sqrt{2}\text{\hspace{0.17em}}A$

(2) 2500 rad – s–1 and 5A

(3) 2500 rad – s–1 and $\frac{5}{\sqrt{2}}A$

(4) 25 rad – s–1 and $5\sqrt{2}\text{\hspace{0.17em}}A$

(2) Resonance frequency

$\omega =\frac{1}{\sqrt{LC}}=\frac{1}{\sqrt{8×{10}^{-3}×20×{10}^{-6}}}=2500\text{\hspace{0.17em}}rad/\mathrm{sec}$

Resonance current = $\frac{V}{R}=\frac{220}{44}=5A$

Difficulty Level:

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