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Physics-

General

Easy

Question

Three rods of material x and three rods of material y are connected as shown in figure all the rods are of identical length and cross section If the end A is maintained at 60 $degree$ C and the junction E at 10 $degree$ C, find effective Thermal Resistance Given length of each rod=l, area of cross-section=A, conductivity of x=K and conductivity of y=2K

$\frac{4 l}{3 K A}$
$\frac{7 l}{6 K A}$
$\frac{4 K A}{3 l}$
$\frac{7 K A}{3 l}$

The correct answer is: $fraction numerator 7 l over denominator 6 K A end fraction$

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