Conduction Band Theory

In an insulating material..

I.The valence band is filled

II. the conduction band is filled

III. the valence band is empty

IV. the conduction band is empty

• I only

• ii and III

• I and IV

• I and II

A material with a relatively large gap between its valence band and conduction band would be expected to be __

• a good conductor

• esily melted

• a poor conductor

• in a crystal state

What is the approximate energy gap between the valance and conduction band of a semiconductor?

• 0 eV

• 1 eV

• 5 eV

• 10 eV

A material that conducts electricity well tends to have___

• no valance electrons

• partially filled bands

• completely filled bands

• conduction and valance bands that are far apart

How can the conductivity of a semi-conductor be increased?

• apply a magnetic field

• apply an electric field

• increase the temperature

• apply an electric field and increasing the temperature

The energy level diagram shown applies to ___

• a conductor

• an insulator

• a semi-conductor

• an isolated atom

Tags

NGSS.HS-PS2-6

True or false

Band theory explains electric conduction in terms of energy bands and forbidden gaps.

• True

• False