A) \[\frac{f}{2}\]
B) \[2f\]
C) \[f\]
D) \[\frac{f}{4}\]
Correct Answer: A
Solution :
Frequency, \[f=\frac{1}{2\pi \sqrt{LC}}\] When capacitance\[=4C,\] then \[f=\frac{1}{2\pi \sqrt{4LC}}=\frac{f}{2}\]
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