Question

A 10 ohm resistance, 5 mH coil and 10 μF 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

Answer 1

Answer: (C)

Remains unchanged

Answer 2

Resonant frequency $= \frac{1}{2\pi\sqrt{LC}}$does not depend on resistance.