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Byju's Answer

Standard XII

Physics

Stefan-Boltzman's Law

A composite b...

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.

Heat flow through A and E slabs are same

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Heat flow through slab E is maximum

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Temperature difference across slab is smallest

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Heat flow through C

=

heat flow through B

+

heat flow through D

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Solution

The correct options are
A Heat flow through A and E slabs are same
C Temperature difference across slab is smallest
D Heat flow through C $=$ heat flow through B $+$ heat flow through D

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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.

The correct options are A Heat flow through A and E slabs are same C Temperature difference across slab is smallest D Heat flow through C= heat flow through B+ heat flow through D

The correct options are
A Heat flow through A and E slabs are same
C Temperature difference across slab is smallest
D Heat flow through C $=$ heat flow through B $+$ heat flow through D