Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K, respectively. The equivalent thermal conductivity of the slab is

 

 Question:  100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET 2003

Consider a compound slab consisting of two

different materials having equal thicknesses and

thermal conductivities K and 2K, respectively. The

equivalent thermal conductivity of the slab is

(a) 2/3K

 (b) Root 2 K 

(c) 3 K 

(d) 4/3K                                                 (2003)