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A battery is combination of two or more ...

A battery is combination of two or more cells. In the following figure , a single battery is represented in which two cells of emf `epsi_1` and `epsi_2` and internal resistance `r_1` and `r_2` respectively are connected.

The current in the internal circuit is :

A

`(epsi_1 + epsi_2)/(r_1 + r_2)`

B

`(epsi_2 - epsi_1)/(r_1 + r_2)`

C

`(epsi_1)/(r_1) - (epsi_2)/(r_2)`

D

`(epsi_1)/(r_2) - (epsi_2)/(r_1)`

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