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MGIMS WARDHA MGIMS WARDHA Solved Paper-2010

  • question_answer
    A battery of four cells in series, each having an emf of 1.4V and an internal resistance of \[2\Omega \]is to be used to charge a small 2 V accumulator of negligible internal resistance. What is the charging current?

    A)  0.1 A                                    

    B)  0.2 A

    C)  0.3 A                                    

    D)  0.45 A

    Correct Answer: D

    Solution :

                     Current,  \[I=\frac{nE-e}{nr}=\frac{4\times 1.4-2}{4\times 2}\] \[=\frac{5.6-2}{8}=\frac{3.6}{8}\] \[=0.45\text{ }A\]


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