KVPY2012PhysicsThermal Properties of Matter
A cylindrical steel rod of length 0.10 ~m and thermal conductivity 50 ~W m ⁻¹ ~K ⁻¹ is welded end to end to copper rod of thermal conductivity 400 ~W m ⁻¹ . K ⁻¹ and of the same area of cross section but 0.20 ~m long. The free end of the steel rod is maintained at 100^ C and that of the copper and at 0^ C . Assuming that the rods are perfectly insulated from the surrounding, the temperature at the junction of the two
Options
- A20^ C
- B30^ C
- C40^ C
- D50^ C
Correct answer
A. 20^ C
Step-by-step solution
50 A (100- T ) 0.1 = 400 A ( T -0) 0.2