Two metal wires of identical dimensions are connected in parallel.If "rho_(1)" and "rho_(2)" are the resistivities of the metal wire respectively,the effective resistivity of the combination will be

Two metal wires of identical dimensions are connected in series. If sigma_(1) and sigma_(2) are the conductivities of the metal wires respectively, the effective conductivity of the combination is

Two metal wires of identical dimensions are connected in series. If sigma_(1) and sigma_(2) are the conductivities of the metal wires respectively, the effective conductivity of the combination is

Two metal wires of identical dimensions are connected in series if sigma_(1) and sigma_(2) are the conductivity of the metal wire respectively the effiective conductivity of the combination is

Two metal wires of identical dimesnios are connected in series. If sigma_(1) and sigma_(2) are the conducties of the metal wires respectively, the effective conductivity of the combination is

Two metal wires of identical dimesnios are connected in series. If sigma_(1) and sigma_(2) are the conducties of the metal wires respectively, the effective conductivity of the combination is

Two metal wires of identical dimesnios are connected in series. If sigma_(1) and sigma_(2) are the conducties of the metal wires respectively, the effective conductivity of the combination is

Two metal wires of idential dimensions are connected in series. If sigma_(1) and sigma_(2) are the conductivities of the metals respectively, the effective conductivity of the combination is

Two metal wires of identical dimensions are connected in series. If sigma_1 and sigma_2 are the electrical conductivities of the metal wires respectively, the effective conductivity of the combination is