Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are` R_(1) and R_(2) (R_(1) gt R_(1))`. If the potential difference across the source having internal resistance `R_(2)` is zero, thenA. `R = R_(1)R_(2)//(R_(1)+R_(2))`B. `R = R_(1)R_(2)//(R_(2)-R_(1))`C. `R = R_(2) xx (R_(1) +R_(2))// (R_(2)-R_(1))`D. `R = R_(2) -R_(1)`

Two sources of equal emf are connected to an external resistance R. Th

1.	Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are` R_(1) and R_(2) (R_(1) gt R_(1))`. If the potential difference across the source having internal resistance `R_(2)` is zero, thenA. `R = R_(1)R_(2)//(R_(1)+R_(2))`B. `R = R_(1)R_(2)//(R_(2)-R_(1))`C. `R = R_(2) xx (R_(1) +R_(2))// (R_(2)-R_(1))`D. `R = R_(2) -R_(1)`
Answer» Correct Answer - D

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