An accumulator battery (storage cell) `B` of emf `epsilon` and internal resistance `r` is being charged from `DC` supply whose terminals are `T_1` and `T_2`
.

Options

A. Potential difference between `T_1` and `T_2` must be ` gt epsilon`
B. `T_1` must be positive with respect to `T_2`
C. In the battery, current flows from the positive to the negative terminal
D. All the above options are correct.

Answer

D

Explanation

`V_(T_1) - V_(T_2) = E + ir`.