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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
- ₉₂U²³⁴ has 92 protons and 238 nucleons. It decays by emitting an alpha particle
- A projectile is thrown in the upward direction making an angle of 60°with the horizontal
- A geostationary satellite is orbiting the earth at a height of 5R above that surface
- A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically.
- A coil of N turns and mean cross-sectional area A is rotating with uniform angular
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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