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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: - A metal rod of length l cuts across a uniform magnetic field B with a velocity v.
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A metal rod of length l cuts across a uniform magnetic field B with a velocity v.
- An ideal gas is compressed to half its initial volume by means of several processes.
- Two discs of same material and thickness have radii 0.2 m and 0.6 m.
- The current flowing through a lamp marked as 50 W and 250 V is
- Huygen’s principle of secondary wavelets may be used to
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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