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Q.

One end of a metal rod is dipped in boiling water and the other is dipped in melting ice.

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a

All parts of the rod are in thermal equilibrium with each other

b

We can assign a temperature to the rod

c

We can assign a temperature to the rod after steady state is reached.

d

The state of the rod does not change after steady state is reached.

answer is D.

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Detailed Solution

detailed_solution_thumbnail

In steady state,

  1. Each point along the rod has a unique temperature which is temperature from others
  2. Temperature gradient is constant if the the rod has uniform cross-sectional area
  3. Heat flow rate is constant
  4. Temperature distribution of the rod remains unchanged afterwards
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