NEET Sample Paper NEET Sample Test Paper-50

  • question_answer An rms voltage of 110 V is applied across a series circuit having a resistance 11 Q and impedance 22Q. The power consumed is-

    A) 275 W

    B) 366 W

    C) 55 0 W             

    D) 1100 W

    Correct Answer: A

    Solution :

    \[P={{E}_{v}}{{I}_{v}}\,\,\cos \phi \] \[P={{E}_{v}}\,\,\frac{{{E}_{v}}}{Z}\frac{R}{Z}\] \[or\,\,P=\frac{{{E}_{v}}^{2}R}{{{Z}^{2}}}\,\,=\,\frac{110\times 110\times 11}{22\times 22}\,\,W=275\,\,W\]              


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