NEET 2023 Phase 1 · PhysicsResonant frequencyPrevious Year Question
In a series LCR circuit, the inductance L is 10 mH, capacitance C is 1 μF and resistance R is 100 Ω. The frequency at which resonance occurs is:
Answer: (D) 1.59 kHz. Answer: (D) 1.59 kHz Solution: f = 1/(2π√(LC)) = 1/(2π√(10×10⁻³ × 1×10⁻⁶)) = 1/(2π×10⁻⁴) = 10⁴/(2π) = 10⁴/6.28 ≈ 1.59×10³ Hz = 1.59 kHz.
- A.15.9 rad/s
- B.15.9 kHz
- C.1.59 rad/s
- D.1.59 kHz✓
Correct Answer
(D) 1.59 kHz
Solution & Explanation
Answer: (D) 1.59 kHz Solution: f = 1/(2π√(LC)) = 1/(2π√(10×10⁻³ × 1×10⁻⁶)) = 1/(2π×10⁻⁴) = 10⁴/(2π) = 10⁴/6.28 ≈ 1.59×10³ Hz = 1.59 kHz.
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