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

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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

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