Chapter 12, Problem 12.84P

(a)

Interpretation Introduction

Interpretation:

The effect of an increase in temperature on the electrical conductivity of a conductor is to be determined.

Concept introduction:

Band theory is a model that defines the energy of the electrons in the solid and determines the conductivity of the solids. It is derived from the theory of the molecular orbital. The lower occupied molecular orbital is known as valence band and higher unoccupied molecular orbital are known as the conduction band. The solids can be classified on the basis of band theory as follows:

1. Conductors.

2. Semiconductor

3. Insulators

(b)

Interpretation Introduction

The effect of an increase in temperature on the electrical conductivity of a semiconductor is to be determined.

Concept introduction:

Band theory is a model that defines the energy of the electrons in the solid and determines the conductivity of the solids. It is derived from the theory of the molecular orbital. The lower occupied molecular orbital is known as valence band and higher unoccupied molecular orbital are known as the conduction band. The solids can be classified on the basis of band theory as follows:

1. Conductors.

2. Semiconductor

3. Insulators

(c)

Interpretation Introduction

The effect of an increase in temperature on the electrical conductivity of an insulator is to be determined.

Concept introduction:

Band theory is a model that defines the energy of the electrons in the solid and determines the conductivity of the solids. It is derived from the theory of the molecular orbital. The lower occupied molecular orbital is known as valence band and higher unoccupied molecular orbital are known as the conduction band. The solids can be classified on the basis of band theory as follows:

1. Conductors.

2. Semiconductor

3. Insulators