Two wires of same radius having lengths l_1 and l_2 and resistivities \rho_1 and \rho_2 are connected in series. The equivalentresistivity will be

Correct Answer is : ρ1l1+ρ2l2l1+l2

\frac{\rho_1l_2+\rho_2l_1}{\rho_1+\rho_2}

\frac{\rho_1l_1+\rho_2l_2}{l_1+l_2}

\frac{\rho_1l_1-\rho_2l_2}{l_1-l_2}

\frac{\rho_1l_2+\rho_2l_1}{l_1+l_2}

WBJEE 2016 Physics Solved Paper

Question : 6 of 40

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Two wires of same radius having lengths l1 and l2 and resistivities ρ1 and ρ2 are connected in series. The equivalentresistivity will be

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