RAJASTHAN ­ PET Rajasthan PET Solved Paper-2001

  • question_answer
    The power factor of L-C- R circuit at resonance is

    A)  zero               

    B)  1

    C)  0.5                

    D)  0.766

    Correct Answer: B

    Solution :

     Power factor, \[\cos \phi =\frac{R}{Z}\] In resonant position,\[Z=R\] \[\therefore \] \[\cos \phi =1\]


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