Question

Which statement is true? Select one: O a. The electrical conductivity of a semiconductor increases with temperature b. The resistivity of a semiconductor increases with temperature o c. Metals and semiconductors have similar electrical conducting properties O d. The electrical conductivity of a metal increases with temperature Save response

Answer 1

0 The conductivity of a semi-conductor increases with increase an temperature as due to increase in temperature gap between conductance band & valence band decreases so conduction becomes easy @ 2nd statement is also as when temperture nereases conductivity Increases but resistwity 3 S decreases becaz act is the opposition to flove of charge carriers ② false; as Metals & Semi Conductors have entirely different properties, based on band theory } electrical Conductivity of Metal decrease with increase in temperature as due to electronic collision flow of ē is stopped o conductivity decreases.

Bas OO is correct statement. as coordination number depends on charge ratio as are arranged as per their changes. x Y₂ : ²+: Y - magnitude 2 : 1 coordination ax :x i f aos coordination number 9 Y then cardination noo of x =2 a a statement is false . as MU means unit cell has worce number of Y as there are X 2+ mo - to; of a