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Question

Two thermally insulated chambers are as shown in figure. Mark out the correct option regarding these

A
In Fig.1 thermal equilibrium of A,B and C can be achieved, and hence final temperature of A,B and C are the same.
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B
In Fig.2, thermal equilibrium of A,B and C would be achieved
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C
Both (1) and (2) are right
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D
(2) is right but (1) is wrong
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Solution

The correct option is A In Fig.1 thermal equilibrium of A,B and C can be achieved, and hence final temperature of A,B and C are the same.Given: we know that heat can be exchanged through conducting medium and heat cannot be exchanged through insulating medium.Solution:−−−−−−−−−seefigure1−−−−−−−−−−−−−−−−the temperature of A = temperature of C (there is a conducting slab between A and B) the temperature of B = temperature of C (there is a conducting slab between B and C) so ultimately temperature of A becomes equal to temperature B −−−−−−−−−−seefigure2−−−−−−−−−−−−−−−−−here temperature of A = temperature of B≠ temperature of C (as there is an insulating medium attached to C from both sides of A and B) so here thermal equilibrium can't be established in fig. 2.So, the correct OPTION is A

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