Thermal
conductivity of non-metallic amorphous solids with decrease in temperature
Increases
Decreases
Remains
constant
May increase or decrease depending on temperature
Decreases
Conductivity of crystalline solids is greater than amorphous solid due to the voids presents in amorphous solids are greater. Now when the temperature is decreased there is lattice vibration in the arrangement of amorphous solid due to which it blocks the flow of e- and since we know flow of e- constitutes 70% of conduction. Hence the thermal conductivity decreases.
Hence,
the correct option is (B).
Preparing students for success in a changing World.
We care about our students
RPSC-AE, RSMSSB-JE, SSC-JE, RRB-JE, PSU's