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Banking Physics Electricity and Circuits Question Bank Electricity

  • question_answer
    An AC generator of 220V having internal resistance r =\[10\Omega \] and external resistance R =\[100\Omega \]. What is the power developed in the external circuit?

    A)  484 W                         

    B)  400 W  

    C)  441 W             

    D)         369 W

    Correct Answer: B

    Solution :

     V=200V; r= \[10\Omega \] R'= 10+ \[100\Omega \] = \[110\Omega \] \[I=\frac{V}{R'}=\frac{220}{100}=2A\] \[P={{I}^{2}}R=4\times 100=400W\]


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