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In an LCR circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to
Options
(a) 4 L
(b) 2 L
(c) L/2
(d) L/4
Correct Answer:
L/2
Explanation:
At resonance ω = 1 / √(LC)
Since ω is constant,
Therefore, LC = L’C’ = L’ × 2C
⇒ L’ = L / 2
Related Questions: - In thermodynamics processes which of the following statements is not true?
- A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta
- The momentum of a photon of energy 1 MeV in kg m/s will be
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In thermodynamics processes which of the following statements is not true?
- A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta
- The momentum of a photon of energy 1 MeV in kg m/s will be
- An air bubble in a glass slab with refractive index 1.5 (near normal incidence)
- A balloon with mass m is descending down with an acceleration a
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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