NEETPhysicsThermal Properties of Matter
What is the equivalent thermal conductivity (in W m ⁻¹ K ⁻¹ ) of the compound bar made by soldering together an iron bar (L1 = 0.1 m, A1 = 0.02 m2, K1 = 79 W m ⁻¹ K ⁻¹ ) and a brass bar (L2 = 0.1 m, A2 = 0.02 m2, K2 = 109 W m ⁻¹ K ⁻¹ ), with their free ends maintained at 373 K and 273 K respectively?
Options
- A84.0 W m ⁻¹ K ⁻¹
- B88.3 W m ⁻¹ K ⁻¹
- C91.6 W m ⁻¹ K ⁻¹
- D95.9 W m ⁻¹ K ⁻¹
Correct answer
C. 91.6 W m ⁻¹ K ⁻¹
Step-by-step solution
Correct Option is : (C) 91.6 W m ⁻¹ K ⁻¹