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प्रश्न
The power factor of an AC circuit having resistance (R ) and inductance (L) connected in series and an angular ω is ______.
पर्याय
R/ωL
R/(R2 + ω2L2)1/2
ωL/R
R/(R2 - ω2L2)1/2
MCQ
रिकाम्या जागा भरा
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उत्तर
The power factor of an AC circuit having resistance (R ) and inductance (L) connected in series and an angular ω is R/(R2 + ω2L2)1/2.
Explanation:
Net impedance of circuit Z = `sqrt("X"_"L"^2 + "R"^2)`
Power factor, cos `phi = "R"/"Z"`
⇒ cos `phi = "R"/sqrt("R"^2+omega^2"L"^2)`
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