Question

In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be change from L to

• A. 4L
• B. 2L
• C. L/2
• D. L/4

Answer 1

Answer: (C)

L/2

Answer 2

$\nu_{0} = \frac{1}{2\pi\sqrt{LC}}$

If C changes to 2C then for keeping ν₀ constant L must change to L/2.