Electricity in Our Lives
UNIVERSITY „VALAHIA” OF TÂRGOVIŞTE FACULTY OF ELECTRICAL ENGINEERING
ELECTRONIC AND TELECOMMUNICATION DOMAINE
PAPER FOR THE ENGLISH COURSE
“Electricity in our lives”
Made by Student Pană Nicolae Alexandru 2nd year, group nr. 2
TÂRGOVIŞTE
2010
List of contents
1. Introduction 3
2. Short History 3
3. Definition 4
4. Electricity sources 4
5. Current Electricity 7
6. Electromagnetism 8
7. Uses of electricity 9
8. Generating Stations 10
1. Introduction
Electricity means all the phenomena that result from the interaction of electrical charges. Electric and magnetic effects are caused by the relative positions and movements of charged particles of matter. When a charge is stationary (static), it produces electrostatic forces on charged objects, and when it is in motion it produces additional magnetic effects. So far as electrical effects are concerned, objects can be electrically neutral, positively charged, or negatively charged. Positively charged particles, such as the protons that are found in the nucleus of atoms, repel one another. Negatively charged particles, such as the electrons that are found in the outer parts of atoms, also repel one another (see Atom). Negative and positive particles, however, attract each other. This behavior may be summed up as: like charges repel, and unlike charges attract.
[pic]
Lightning
Charges between clouds or between a cloud and the ground produce atmospheric electrical discharges—lightning. The flow of electricity from one discharge point to another also produces a sound wave heard as thunder.
2. Short History
Before the concept of electricity appeared people were aware of it by shocks from an electric fish called "Thunderer of the Nile". Similar reports appeared a few thousand years later, in the works of ancient Greek, Roman and Arabic naturalists and physicians.
ELECTRONIC AND TELECOMMUNICATION DOMAINE
PAPER FOR THE ENGLISH COURSE
“Electricity in our lives”
Made by Student Pană Nicolae Alexandru 2nd year, group nr. 2
TÂRGOVIŞTE
2010
List of contents
1. Introduction 3
2. Short History 3
3. Definition 4
4. Electricity sources 4
5. Current Electricity 7
6. Electromagnetism 8
7. Uses of electricity 9
8. Generating Stations 10
1. Introduction
Electricity means all the phenomena that result from the interaction of electrical charges. Electric and magnetic effects are caused by the relative positions and movements of charged particles of matter. When a charge is stationary (static), it produces electrostatic forces on charged objects, and when it is in motion it produces additional magnetic effects. So far as electrical effects are concerned, objects can be electrically neutral, positively charged, or negatively charged. Positively charged particles, such as the protons that are found in the nucleus of atoms, repel one another. Negatively charged particles, such as the electrons that are found in the outer parts of atoms, also repel one another (see Atom). Negative and positive particles, however, attract each other. This behavior may be summed up as: like charges repel, and unlike charges attract.
[pic]
Lightning
Charges between clouds or between a cloud and the ground produce atmospheric electrical discharges—lightning. The flow of electricity from one discharge point to another also produces a sound wave heard as thunder.
2. Short History
Before the concept of electricity appeared people were aware of it by shocks from an electric fish called "Thunderer of the Nile". Similar reports appeared a few thousand years later, in the works of ancient Greek, Roman and Arabic naturalists and physicians.
Bibliography: 1. http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx 2. http://en.wikipedia.org/wiki/Electricity 3. http://en.wikipedia.org/wiki/Electric_power 4. http://www.poweredgenerators.com/portable-generator.html