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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: - If the magnetising field on a ferromagnetic material is increased, its permeability
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the magnetising field on a ferromagnetic material is increased, its permeability
- In insulators (CB is Conduction Band and VB is Valence Band)
- Two bulbs 40 watt and 60 watt and rated voltage 240 V are connected in series
- A radioactive substance decays to 1/16th of its initial activity in 40 days.
- A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall.
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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