Question

In LCR series circuit, the capacitor is charged from C to 4C. For the same resonant frequency, the inductance should be changed from L to

Answer 1

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Physics

Alternating Current

Resonance

In an LCR series circuit, t...

PHYSICS

In an LCR series circuit, the capacitor is changed from C to 4C. For the same resonant frequency, the inductance should be changed from L to

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ANSWER

For resonance:

X

L

=X

C

ωL=

ωC

1

ω=

2C

1

2πf=

2C

1

For same resonant frequency:

LC should be constant.

So, LC = 4CL

1

⇒L

1

=

4C

LC

=

4

L