Q. A $10\ ohm$ resistance, $5\ mH$ coil and $10\ \mu F$ capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency
A) Is halved
B) Is doubled
C) Remains unchanged
D) In quadrupled
Explanation
(c) Resonance frequency $= \frac{1}{2\pi\sqrt{LC}}$ does not depend on resistance
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.