Insulating materials will have a wide band gap between the f

Insulating materials will have a wide band gap between the filled valence band and Filled inner shell Full conduction band Partially filled valence band Empty conduction band A p-n rectifying junction makes use of what type of semiconductors? insulating extrinsic transistor intrinsic Which of the following is a material property which does not depend on the geometry of the material? Resistance Current density Conductance Resistivity

Solution

1)

In insulators the electrons in the valence band are separated by a large gap from the empty conduction band, in conductors like metals the valence band overlaps the conduction band, and in semiconductors there is a small enough gap between the valence and conduction bands that thermal or other excitations can bridge the gap

2)

A common type of transistor, the bipolar junction transistor, consists of two p–n junctions in series

3)

Electrical resistivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current.