Three metal rods of same lenghs and same area of cross sections having conductivities `1,2,3,` units are connected in series Then their effective conductivity will be .

The metal rods of same length and same area of cross-section are connected in series. If their condcutivites are 120 Wm^(-1) and 240 Wm^(-1) K^(-1) the effective conductivity of the combination is

Two metallic rods are connected in series. Both are of same material of same length and same area of cross-section. If the conductivity of each rod be k, then what will be the conductivity of the combination ?

Three metal rods of same length and same cross - sectional area are connected in parallel. If their conductivities area 70, 110, 180 Wm^(-1) K^(-1) respectively, the effective conductivity (in Wm^(-1) K^(-1)) of the combination is

n conducting wires of same dimensions but having resistivities 1,2,3,….n are connected is series. The equivalent resistivity of the combination is

Three conductors of conductances G_(1), G_(2) " and " G_(3) are connected in series. Find their equivalent conductance.

Statement I: Two solid cylindrical rods of identical size and different thermal conductivity K_1 and K_2 are connected in series. Then the equivalent thermal conductivity of two rods system is less than that value of thermal conductivity of either rod. Statement II: For two cylindrical rods of identical size and different thermal conductivity K_1 and K_2 connected in series, the equivalent thermal conductivity K is given by (2)/(K)=(1)/(K_1)+(1)/(K_2)

Two identical metal wires of thermal conductivities K_(1) and K_(2) respectively are connected in series. The effective thermal conductivity of the combination is :