NEET Sample Paper NEET Sample Test Paper-9

  • question_answer A series combination of R, L and C is connected to an AC source. If the resistance is 30 and reactance is \[4\Omega \]. The power factor of the circuit is:

    A)  \[0.4\]                         

    B)  \[0.6\]

    C)  \[0.8\]                         

    D)  \[1.0\]

    Correct Answer: B

    Solution :

    As, the power factor \[\cos \,\phi =\frac{R}{Z}=\frac{R}{\sqrt{{{R}^{2}}+{{X}^{2}}}}\frac{3}{5}=0.6\] Here,            X= reactance = \[4\Omega \]

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