This work started with an extensive literary research in an attempt to find out facts about the instrument. This led to probing the history of wheat stone bridge meter, how it was developed up till the point where wheat stone bridge meter of different designs were made. The wheat stone bridge meter is used in the measurement of an unknown resistance you all agree with us that without these wheat stone bridge meter, the amount of flow of current cannot be possible. The material used in construction of this wheat stone bridge meter includes wood, copper strip, brass terminals and wire, rule and constantan wire. The wood was first of all cut into its various size to suit the required shape needed, it was then smoldered in other to make it smooth and neat. Some points were marked out for the fixing of the brass terming and the copper wire, which are chosen.

The copper and the brass terminals have been fixed in the meter rule in its normal position. In conclusion the government should try and make the material for this construction to be available in our country so that it will be easy for student to carry out practical in a healthy environment.

Title page

Certification

Dedication

Acknowledgement

Abstract

Table of contents

CHAPTER ONE

1.1 Introduction

1.2 Definitions

1.3 Statement of research

1.4 Aims and objectives

1.5 Limitations

1.6 Statement of problems

1.7 Significant of study

CHAPTER TWO

2.1 Literature Review

2.2 The Meter Bridge

2.3 The Galvanometer

2.4 The Post Office Box

2.5 Table of Figures

CHAPTER THREE

3.1 CONSTRUCTION OF THE METER BRIDGE

3.2 Method and Materials

CHAPTER FOUR

4.1 Experiment and result

4.2 Precaution and observation

CHAPTER FIVE

5.1 Conclusion

REFERENCE

CHAPTER ONE

1.1 INTRODUCTION

A wheat stone bridge meter is an important widely used device for rapid and precise measurement of electrical resistances. The meter bridge has existed since (1837) in London by sir Charles, the physicist and this development have occurred at a phenomenal rate in technology development. The wheat stone which consist of four resistances, P, Q, R, S joined to form a cross one pair a, e of opposite junctions and a sensitive galvanometer G. across the other junction, the galvanometer maintain the passage of current flowing into the circuit.

1.2 DEFINITIONS

A wheat stone bridge meter is defined as an instrument, used to measure an unknown resistance.

1.3 AIMS AND OBJECTIVES

Construction of wheat stone bridge meter.

1.4 LIMITATIONS

The limitation is based on the construction of the meter bridge.

1.5 STATEMENT OF PROBLEMS

They are:

(1) It is very scarce in I.M.T

(2) The materials used in constructing the meter bridge is very expensive especially the copper, brass terminals.

1.6 SIGNIFICANT OF STUDY

The study of wheat stone bridge have been very important in the laboratories in so many ways:

(1) It is used to measure the unknown resistance.

(2) It is used to know the type of resistance or classes suitable for the construction of electrical circuit bearing in mind the amount of potential different that will be applied to the circuit.

It is used to determine the amount of current flowing in the circuit.

CHAPTER TWO

2.1 LITERATURE REVIEW

A WHEATSTONE BRIDGE

During the ninetieth century, technological developments have occurred at a phenomenal rate. The advancement in science and technology has not only contribution to this development but has it set experience fantastic growth.

WHEAT STONE

Sir Charles, an English physicist, a founder of modern teregraphy from (1802 to 1875) determined the speed of electric discharge in conductors by means of a revolving mirror, in conjugation with W.F Cooke who took out a patent for the electric teregraphy in (1837). He investigated the transmission of sound in solid, furnished an explanation of chladnis figure and invested the concertina. He also studies optics in particular the eye, vision and there are various methods of measuring resistances such as application of ohm-meter, voltmeter, ammeter, potentiometer, and substitution method, the wheat stone bridge is an important and widely used device for rapid and precise measurement of electrical resistances.

The wheat stone bridge circuit which is illustrated in figure 1 below, consist of four resistances P, Q, R, S joined to form a complete circuits with a battery A across one pair, a, e of opposite junctions and a sensitive galvanometer G across the other junctions b, d.