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Question
In LCR circuit, the capacitance is changed from C to 4C. For some resonant frequency, the inductance should be changed from L to ____________.
Options
4L
L/4
L/2
2L
MCQ
Fill in the Blanks
Solution
In LCR circuit, the capacitance is changed from C to 4C. For some resonant frequency, the inductance should be changed from L to L/4.
Explanation:
`"using," "f"_"r" = 1/(2pi sqrt"LC") Rightarrow "L" prop 1/"C" "for fixed" "f"_"r"`
`therefore "L"_2/"L"_1 = "C"_1/"C"_2 = "C"/(4"C") Rightarrow "L"_2 = "L"/4`
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Electric Resonance
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