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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 equivalent emf of this combination is :

A

`(epsi_(1)r_(1) + epsi_(2)r_2)/(r_1+ r_2)`

B

`(epsi_(1)r_(1) - epsi_(2)r_2)/(r_1+ r_2)`

C

`(epsi_(1)r_(2) - epsi_(2)r_1)/(r_1+ r_2)`

D

`espi_1 - epsi_2`

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