Transmission Of Heat Question 305
Question: Two identical plates of different metals are joined to form a single plate whose thickness is double the thickness of each plate. If the coefficients of conductivity of each plate are 2 and 3 respectively, then the conductivity of composite plate will be
Options:
A) 5
B) 2.4
C) 1.5
D) 1.2
Show Answer
Answer:
Correct Answer: B
Solution:
Thermal conductivity of composite plate $ K _{eq}=\frac{2K _{1}K _{2}}{K _{1}+K _{2}}=\frac{2\times 2\times 3}{2+3} $
$ =\frac{12}{5} $ =2.4
BETA
