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…

Question

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

Accepted Answer

Correct answer: A, C, D. (a, c, d) (a): At steady state, heat flow through A and E are same. (c): ∆T = i × R ‘i’ is same for A and E but R is smallest for E. (d): iB = TR_B i_C = TR_C iD = TR_D if i_c = iB + iD Hence ⇒ 8 KAl= 3 KAl+ 5 kAl

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

Solution

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