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MGIMS WARDHA MGIMS WARDHA Solved Paper-2003

  • question_answer
    A battery of 12 volt is charged by a supply of 100 volt as shown in the figure. The charging current is 1.0A. Calculate the value of R :

    A) \[45\Omega \]                                                 

    B) \[105\,\Omega \]

    C) \[88\,\Omega \]                              

    D) \[95\,\Omega \]

    Correct Answer: C

    Solution :

    Effective emf of the circuit is \[E=100-12=88\text{ }volt\] Now,                                     \[i=\frac{E}{R}\] \[\Rightarrow \]                               \[R=\frac{E}{i}=\frac{88}{1}\] \[\Rightarrow \]                               \[R=88\,\Omega \]


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