Two cylindrical conductors with equal ...

Two cylindrical conductors with equal cross-sections and different resistivites `rho_(1)` and `rho_(2)` are point end to end. Find the charge at the boundary of the conduction if a current `I` flows from conductor 1 to conductor 2

`epsilon_(0)(rho_(2)-rho_(1))l`

`epsilon_(0)(2rho_(2)+rho_(1))l`

`2epsilon_(0)(rho_(1)-rho_(2))l`

`epsilon_(0)(rho_(1)+rho_(2))l`

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