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NEET
Exam
NEET
Subject
Physics
Chapter
Thermal Properties of Matter

NEET · Physics · Thermal Properties of Matter

What is the equivalent thermal conductivity (in W m ^ -1 K ^ -1 )...

What is the equivalent thermal conductivity (in Wm−1{{m}^{-1}} K−1{{K}^{-1}}) of the compound bar made by soldering together an iron bar (L1 = 0.1 m, A1 = 0.02 m2, K1 = 79 Wm−1{{m}^{-1}} K−1{{K}^{-1}}) and a brass bar (L2 = 0.1 m, A2 = 0.02 m2, K2 = 109 W m−1{{m}^{-1}} K−1{{K}^{-1}}), with their free ends maintained at 373 K and 273 K respectively?
What is the equivalent thermal conductivity (in W m ^ -1 K ^ -1 ) of the compound bar made by soldering together an

Options

  1. A84.0 W m−1{{m}^{-1}} K−1{{K}^{-1}}
  2. B88.3 W m−1{{m}^{-1}} K−1{{K}^{-1}}
  3. C91.6 W m−1{{m}^{-1}} K−1{{K}^{-1}}
  4. D95.9 Wm−1{{m}^{-1}} K−1{{K}^{-1}}

Correct answer

C. 91.6 W m−1{{m}^{-1}} K−1{{K}^{-1}}

Step-by-step solution

Correct Option is : (C)
91.6 W m−1{{m}^{-1}} K−1{{K}^{-1}}
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