A current source drives a current in a wire of resistance `'R_(1)'`, for a time 't'. The same source drives current in another wire of resistance `'R_(2)'` for the same time. If heat generated is same, find internal resistance of source.

Options

A. `(R_(1) R_(2))/(R_(1) + R_(2))`
B. `R_(1)+ R_(2)`
C. zero
D. `sqrt(R_(1)R_(2))`