Question

To increase the resonant frequency in series LCR circuit-

• A. Source frequency should be increased
• B. Another resistance should be added in series with the first resistance.
• C. Another capacitor should be added in series with the first capacitor.
• D. The source frequency should be decreased.

Answer 1

Answer: (C)

Another capacitor should be added in series with the first capacitor.

Answer 2

f=$\frac{1}{2\pi}$×$\sqrt {LC}$
To increase the resonating frequency product of L and C should decrease.
By joining the capacitor in series, the capacitor will decrease