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The power factor of a series L-C-R circu...

The power factor of a series L-C-R circuit at resonance

A

1

B

0.5

C

zero

D

depends on L,C and R.

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Knowledge Check

  • The power factor of an LR circuit carrying an ac of angular frequency omega is

    A
    `R/(omegaL)`
    B
    `(omegaL)/R`
    C
    `R/(sqrt(R^2+omega^2L^2))`
    D
    `R/(sqrt(R^2-omega^2L^2))`

  • In a resonant LCR circuit,

    A
    power factor is zero
    B
    power factor is one
    C
    power dissipated in the resistor is zero
    D
    power dissipated in the capacitor is zero

  • Statement I: Q-factor of a series LCR circuit is 1/Rsqrt(L/C) Statement II: Resonant frequency of an LCR circuit does not depend on the resistance of the circuit.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true, statement II is not a correct explanation for statement I
    C
    Statement I is true, statement II is false
    D
    Statement I is false, statement II is true

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    Match the columns for a series LCR circuit.

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