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Power factor of AC series circuit having...

Power factor of AC series circuit having resistance R and inductor L having angular frequency `omega` is ……..

A

0

B

`R/sqrt(R^2+omega^2L^2)`

C

`(omegaL)/R`

D

`R/(omegaL)`

Text Solution

Verified by Experts

The correct Answer is:
B
`|Z|=sqrt(R^2+omega^2L^2)`
`therefore` power factor =`R/"|Z|"`
`=R/sqrt(R^2+omega^2L^2)`
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Knowledge Check

  • An inductor of inductance L and resistance R is connected of A.C. circuit having angular frequency of omega . The value of quality factor Q is ……

    A
    `((omegaL^2)/R)^2`
    B
    `(R/(omegaL^2))^2`
    C
    `(omegaL)/R`
    D
    `R/(omegaL)`

  • Ratio of power factor in two A.C. circuits (i) containing only resistance and (ii) containing only inductor is …….

    A
    1
    B
    0
    C
    `oo`
    D
    x (where x `in` N)

  • Power factor in an L-C-R circuit is ……..

    A
    0
    B
    0.5
    C
    1
    D
    depends on the value of L, C, R

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