Electro Magnetic Induction And Alternating Currents Question 194
Question: In a LCR circuit capacitance is changed from C to 1C. For the resonant frequency to remain unchanged, the inductance should be change from L to
Options:
A) 4L
B) 2L
C) $ L/2 $
D) $ L/4 $
Show Answer
Answer:
Correct Answer: C
Solution:
- Resonance frequency, $ {\omega_{0}}=\frac{1}{\sqrt{LC}}=\frac{1}{\sqrt{L’(2C)}} $
$ \therefore ,L’=\frac{L}{2} $ .
