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RLC Circuits and Resonance

Q1:

If the value of C in a series RLC circuit is decreased, the resonant frequency

A is not affected

B increases

C is reduced to zero

D decreases

ANS:B - increases

It's simple,

Xl=xc is resonant frequency.
Xl>xc is resonant frequency decrease.
Xl<xc is resonant frequency increase i.e c decrease means xc increase xc=1/2πfc.



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