which of the following repesents correct order of conductivity in solids ?

Options

A. `k_("metals")gtgtk_("insulators")lt k_("semiconductors")`
B. `k_("metals")ltltk_("insulators")lt k_("semiconductors")`
C. `k_("metals").,k_("semiconductors")gt k_("insulations ")=zero`
D. `k_("metals").,k_("semiconductors")gt k_("insulations ")nezero`

Answer

A

Explanation

conducity of metal , insulator and semiconductors can be represented in the term of k (kappa ) which depends upon energy gap bettween valence band and conducation band .