Two rods of length l and `2l` thermal conductivities `2K` and `K` are connected end to end. If cross sectional areas of two rods are eual, then equivalent thermal conductivity of the system is .

Three rods of lengths L,21 and 3L having thermal conductivities 3K,2K and K are connected end to end If cross sectional areas of three rods are equal If cross sectional areas of three rods are equal then equivalent thermal conductivity of the system is .

A compound slab is made up two slabs. If thermal conductivity of their material are k_(1) and k_(2) respectively of their cross-sectional areas are the same, the equivalent thermal conductivity of the slab is . . . . . (consider series connection)

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)

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)

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)

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)

A composite slab is prepared by pasting two plates of thickness L_(1) and L_(2) and thermal conductivities K_(1) and K_(2) . The slab have equal cross-sectional area. Find the equivalent conductivity of the composite slab.

A composite slab is prepared by pasting two plates of thickness L_(1) and L_(2) and thermal conductivities K_(1) and K_(2) . The slab have equal cross-sectional area. Find the equivalent conductivity of the composite slab.

A composite slab is prepared by pasting two plates of thickness L_(1) and L_(2) and thermal conductivites K_(1) and K_(2) . The slab have equal cross-sectional area. Find the equivalent conductivity of the composite slab.

Two rods of length d_(1) and d_(2) and coefficients of thermal conductivites K_(1) and K_(2) are kept touching each other. Both have the same area of cross-section. The equivalent thermal conductivity.