Question 249: AC fundamentals

Question

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

Accepted Answer

For resonant frequency to remain same $$LC$$ should be const. $$LC=$$ const
$$ \Rightarrow LC = L' 	imes 2C \Rightarrow L' = {L \over 2}$$

Answer

$$L/2$$

Answer

$$2L$$

Answer

$$4L$$

Answer

$$L/4$$

AC fundamentals

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

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