JEE Main & Advanced Sample Paper JEE Main Sample Paper-46

  • question_answer
    Statement I Two non-ideal batteries are connected in parallel, the equivalent emf is smaller than either of the two emfs.
    Statement II Two non-ideal batteries are connected in parallel, the equivalent internal resistance is smaller than either of the two internal resistances.

    A)  Statement I is true, Statement II is also true and Statement II is the correct explanation of Statement I.

    B)  Statement I is true, Statement II is also true and Statement It is not the correct explanation of Statement I.

    C)  Statement I is true, Statement II is false.

    D)  Statement I is false, Statement II is true.

    Correct Answer: D

    Solution :

     Cells in parallel, \[{{E}_{eq}}=\,\frac{\frac{{{\varepsilon }_{1}}}{{{r}_{1}}}+\frac{{{\varepsilon }_{2}}}{{{r}_{2}}}+...+\frac{{{\varepsilon }_{n}}}{{{r}_{n}}}}{\frac{1}{{{r}_{1}}}+\frac{1}{{{r}_{2}}}+...+\frac{1}{{{r}_{n}}}}\] (use proper sign before the Emfs) and      \[\frac{1}{{{r}_{eq}}}=\frac{1}{{{r}_{1}}}+\frac{1}{{{r}_{2}}}+...+\frac{1}{{{r}_{n}}}\]


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