1. Tardigrade
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  4. A composite block is made of slabs A, B, C, D and E of different thermal conductivities (given in terms of a constant K ) and sizes (given in terms of length, L ) as shown in the, figure. All slabs are of same width. Heat 'Q' flows only from left to right through the blocks. Then in steady state

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Q. A composite block is made of slabs $A, B, C, D$ and $E$ of different thermal conductivities (given in terms of a constant $K )$ and sizes (given in terms of length, $L$ ) as shown in the, figure. All slabs are of same width. Heat 'Q' flows only from left to right through the blocks. Then in steady statePhysics Question Image

JEE AdvancedJEE Advanced 2011

Solution:

Let width of each rod is $d$
$R _{1}=\frac{1}{8 kd }, R _{2}=\frac{4}{3 kd } $
$R _{3}=\frac{1}{2 kd }, R _{4}=\frac{4}{5 kd }$
$R _{5}=\frac{1}{24 kd }$

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