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JEE Main & Advanced Sample Paper JEE Main Sample Paper-35

  • question_answer
    A series circuit is having resistance of \[22\,\Omega \] and impedance of \[44\,\Omega \] 220 V(rms) is applied across the circuit. The power consumed is:

    A)  275 W                                  

    B)  550 W

    C)  675 W                                  

    D)  725 W

    Correct Answer: B

    Solution :

    \[{{V}_{ms}}=220\,\,V\]             \[{{i}_{rms}}\,=\frac{{{V}_{rms}}}{Z}\,=\frac{220}{44}=5A\]             \[\cos \phi \,=\frac{R}{Z}\,=\frac{22}{44}\,=\frac{1}{2}\]             \[<P>\,={{V}_{rms}}\,{{i}_{ms}}\,\cos \phi \,=(220)\,(5)\frac{1}{2}\]           = 550W.


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