S3 - Electrical properties of materials

S3 - Electrical properties of materials - Keithley...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
σ = n|e| u e (5) 4-point probe station Keithley 2182 nanovolt meter Keithley 2400 source meter NANYANG TECHNOLOGICAL UNIVERSITY 1 ST YEAR COMMON ENGINEERING COURSE FE1071 Experiment S3: Electrical Properties of Materials Name: Pang Jing Jie Keith Group: BL 05 Tutor: Liu Li Jun Date: 2 nd March 09 Abstract Electrical conductivity (σ) is a measure of a material's ability to conduct an electric current . This experiment enables students to classify materials by their conductivity as well as to familiarize themselves with the techniques employed to measure the conductivity (σ) or electrical resistivity (ρ) of solid materials. In the classification of the electrical conductivity of materials, there are three different types: conductors, semi-conductors and insulators. Conductors have the highest electrical conductance followed by semi-conductors and insulators. Through this experiment, students will also explore how the degree of doping in semi-conductors will affect the nature of a semi-conductor to be either intrinsic or extrinsic. 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Studying the electrical properties of materials is important as many devices around us increasingly run on electricity, and the best material must be chosen for the processing of the product. 2
Background image of page 2
TABLE OF CONTENTS No. Page No. 1 Abstract ……………………………………………………………………… 2 2 Introduction. ..………………………………………………………………. .. 4 3 Objectives……………………………………………………………….……. 4 4 Theory………………. ..……………………………………………………… 4 5 8 6 Results…….………………. ..…….………………. .………………………… 11 7 Questions…………………. .…………………………………………………. 13 8 9 10 11 Additional Questions. ..……….……………………………………………… Points of Discussion. ....……….……………………………………………… Conclusion……………………………………………………………………. References……………………………………………………………………. 16 17 18 19 1. Introduction Electrical conductivity is an indicator of a material’s ability to allow the flow of current through it. This experiment is conducted to determine the conductivity of 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
several materials by measuring their resistivity since conductivity is the reciprocal of resistivity. Resistivity is dependent on the geometry of the material which is known. As the material gets longer or wider, the resistivity will increase proportionately resulting in lower conductivity. 2. Objectives
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

S3 - Electrical properties of materials - Keithley...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online