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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
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A Galilean telescope has an objective of focal length 100 cm and magnifying power 50
- A particle of mass m is projected with a velocity v making an angle of 45°
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
- The work function of a substance is 4.0 eV. The longest wavelength of light
- A moving neutron collides with a stationary α-particle.The fraction of the kinetic energy
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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