Materials and Components
At room temperature the number of conducting electrons in an intrinsic semiconductor

Is about half the number of valence electrons
Is almost equal to the number of valence electrons
Is small as compared to the number of valence electrons
Is a very small fraction of the number of valence electrons

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
Electrical contact materials used in switches, brushes, relay must possess

High thermal conductivity and high melting point
Low thermal conductivity and low melting pointL
Low thermal conductivity and high melting point
High thermal conductivity and low melting point

ANSWER DOWNLOAD EXAMIANS APP