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NTSE Sample Paper NTSE SAT Practice Test-6

  • question_answer
    Two resistors of resistances R and 2R are connected in series in an electric circuit. The ratio  of the electric power consumed by R and 2R is

    A) 1 : 4                 

    B)        4 : 1

    C) 1 : 2                 

    D)        2 : 1       

    Correct Answer: C

    Solution :

    [c] Electric power consumed by R is given by, \[{{P}_{1}}={{I}^{2}}R\] Electric power consumed by (2R) is given by,                     \[{{P}_{2}}={{I}^{2}}\times 2R\] \[\therefore \,\,\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{I}^{2}}R}{2{{I}^{2}}R}=\frac{1}{2}\]


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