Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K 1, K 2, K 3, K 4 and K 5. When points A and B are maintained at different temperatures, no heat flows through the central rod if

Question

Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K 1, K 2, K 3, K 4 and K 5. When points A and B are maintained at different temperatures, no heat flows through the central rod if (A) K 1= K 4 and K 2= K 3 (B) K 1 K 4= K 2 K 3 (C) K 1 K 2= K 3 K 4 (D) ( K 1/ K 4)=( K 2/ K 3)

Tardigrade Admin · Accepted Answer

Correct answer is (b) K 1 K 4= K 2 K 3

Q. Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities $K_{1}, K_{2}, K_{3}$ , $K_{4}$ and $K_{5}$ . When points $A$ and $B$ are maintained at different temperatures, no heat flows through the central rod if

$K_{1} = K_{4}$ and $K_{2} = K_{3}$

$K_{1} K_{4} = K_{2} K_{3}$

$K_{1} K_{2} = K_{3} K_{4}$

$\frac{K _{1}}{K _{4}} = \frac{K _{2}}{K _{3}}$

Correct answer is (b) $K_{1} K_{4} = K_{2} K_{3}$

Q. Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K1​,K2​,K3​, K4​ and K5​. When points A and B are maintained at different temperatures, no heat flows through the central rod if

K1​=K4​ and K2​=K3​

K1​K4​=K2​K3​

K1​K2​=K3​K4​

K4​K1​​=K3​K2​​