Two wires of the same dimensions but resistivities `rho_(1)` and `rho_(2)` are connected in series. The equivalent resistivity o

Two wires of the same dimensions but resistivities `rho_(1)` and `rho_(2)` are connected in series. The equivalent resistivity of the combination is
A. `rho_(1) + rho_(2)`
B. `(rho_(1) +rho_(2))/(2)`
C. `sqrt(rho_(1)rho_(2))`
D. `2(rho_(1)+rho_(2))`

Two wires of the same dimensions but resistivities `rho_(1)` and `rho_(2)` are connected in series. The equivalent resistivity of the combination is

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