Chapter 21, Problem 21.81SP

Interpretation Introduction

Interpretation:

The ascending order of electrical conductivity of given materials has to be arranged.

Concept introduction:

Semiconductor: A material which can conduct electricity in range between a metal and an insulator is known as semiconductor.  Addition of small amount of impurities increases conductivity of semiconductor and the process is known as doping.  n-type and p-type are two types of doped semiconductors.

n-type: This is a type of doped semiconductor in which many free electrons are present in conduction band.

p-type: This is a type of doped semiconductor in which holes are present in valance band.

Insulator: Insulators are one in which electrons are filled in valence band with a vacant conduction band and they are parted away by band gap.  Insulators does not conduct electricity.

Figure 1