MGIMS WARDHA MGIMS WARDHA Solved Paper-2005

  • question_answer
    The power factor of a series LCR circuit when at resonance is :

    A) zero      

    B) 0.5

    C) 1.0

    D) Depends on values of L, C and R

    Correct Answer: C

    Solution :

    Power factor \[\cos \phi =\frac{R}{Z}\]Where Z= Impedance of the circuit at resonance,\[Z=R\] \[\therefore \]  \[\cos \phi =1\]


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