Current Electricity Flow of Electrons Engineering Tutorials

The Nature of Electricity
The modern theory defines matter as electrical in nature. All matter is made up of extremely small particles called molecules, each of which has the properties of matter of which it is a constituent. The molecules, in turn are made up of atoms, which are the smallest units of several elements. An atom consists of central nucleus of positive charge around which small negatively charged particles, called electrons, revolve in different paths or orbits.

Free Electrons
The electrons which can be easily removed or detached from an atom are called free electrons.
In metals, the atom lie very close together in regular formed crystal lattice. The nearness of one atom to another causes the electron in the outer orbit or valence electrons of each atom to be attracted by the nucleus is relatively weak. As a result, a large number of electrons are free to drift about interatomic space from atom to atom. These are called free electrons. The free electrons can be easily removed by applying a small amount of external energy.

Charge
A body is said to be charged if it has either excess or deficit of electrons from normal due share. If an electron is freed from a neutral atom, the proton predominate and the atom is said to posses a positive electric charge.

Unit
The unit of charge is coulomb and 1 coulomb is equal to charge on 628 by 10 to the power of 16. We say that a body has a positive discharge of ano coulomb, it means that it has a deficit of 628 by to the power of 16 electrons from normal due share.

Electric Potential
It is a measure of the density and sign of the electric charge at a point relative to that at some time. Thus electric potential, like electric charges and electric current is a phenomenon of displaced charges that exist in matter. For example, consider a copper rod of six meters length having the same number of electrons and protons distributed uniformly throughout.
If by some means, such as intercepting the flux in a magnetic field, one billion electrons can be shifted towards one end of the rod, that end will posses positive charge. The two ends of rod will have a different of potential. Work has been done to create this difference of potential energy.

Nucleus
It is the central part of an atom and contains protons and neutrons. A proton is positively charged particle while the neutron has nearly the same mass as proton, but has no charge. Therefore, the nucleus of an atom is positively charged. The sum of protons and neutrons constitute the entire weight of an atom and is called its atomic weight, it is because the particles in the extra nucleus has negligible weight as compared to protons or neutrons.

Extra Nucleus
It is the outer part of an atom and contains electrons only. An electron is a negatively charged particle having negligible mass. The charge on an electron is equal but opposite to that on a proton. Also, the number of electrons is equal to the number of protons in an atom under ordinary conditions. Therefore, an atom is neutral as a whole. The number of electrons or protons in an atom is called its atomic number.

How to Produce Electricity from fruits and vegetables free pdf links download

Not only Geothermal, Hydroelectric, Oil based, Thermal, Nuclear, fossil fuel, Nuclear, Biomass, Wind power plant that can produce or generate electricity
but also fruits and vegetables the only difference is that fruits can produce less amount of electricity compared to power plant. The purpose is for project and expirement or small appliance.


Fruit Battery – Electricity
One form of energy can be converted into another. For example, the energy stored in a piece of food can be converted into energy that helps you grow and move. The energy stored in certain kinds of food can also be converted into electricity.


The Electric Fruits
The purpose of this project was to find out which fruit
would generate enough electricity to light a light bulb and to discover which fruit would light the bulb the longest. To conduct my experiments I used a Multimeter, copper and zinc wires & electrodes.


Electric cell
It is Alessandro Volta in Italy who invented the battery for the first time in 1800. That used the zinc and copper plate in the dilute sulfuric acid. This electric cell is a prototype of a dry battery today. Let's make the voltaic cell.


KidsLoveKits dot com
Making electricity from chemicals is based on the same scientific principles on which all modern batteries work. You insert copper and zinc electrodes in an acidic liquid and produce some electricity from the chemical reaction between your electrodes and electrolyte.


Fruits or Chemicals Science Project
Making batteries and producing electricity is among the most exciting and educational experiments that students can try as their school project or science project. To avoid exposure to hazardous chemicals, ScienceProject.com recommends using household materials such as saltwater, lemon juice and other fruit juices or fruits as electrolytes.

List of Electrical and Electronics Engineering project and experiment

Experiments with Electricity
how to make a battery out of money / how to make a battery out of potatoes, how to make yourself spark / how to light a fluorescent tube without connecting, how to make your tongue into a battery / how to test an electric fence, how to prove there is no black in a television picture / how to prove there is no white in a television picture, how to usual television has a strobe light / how to turn a presenter's face purple.


Electricity and Magnetism Experiment
Static Electricity, build a battery holder, lightning rod, a simple computer, switched circuit, parallel circuit.


Projects by students for students
The lemon experiment, The Voltaic pile, making an electromagnet, charger, some different experiments that teach about electricity that you can do at home. Nick's favorite experiment to do is the one involving lemons.


Surfing Scientist - PDF file
Students experiment with aluminium foil, batteries and cheap, readily availably low voltage light bulbs* to construct a simple conductivity tester. They use their conductivity testers to classify a range of materials as conductors or insulators.


A Quick Battery Holder
This is a quick way to hold wires to the terminals of a AAA or a AA battery for electrical experiments. Two modified clothespins are mounted to a 3/4" thick wood spacer. The clothespin springs maintain pressure on the battery terminals.



Experiments with Frictional Electricity
All the experiments and improvised apparatus work.
I will give details and then you can discover for yourself - a more fun way to learn because from your efforts come results that will stay with you.
As far as possible I will try not to say what happens - try it and see is the message.Do not try any mains or battery powered high voltage supplies.


How to measure motor parameters
In torque experiments one end of the string (heavy-duty thread) was taped to the axle, and the other end was attached to the top of a lever. The bottom end of the lever served as a pointer showing the angle on the dial. A lath was attached to the pointer end. Several holes in the lath were used for adding heavy bolts and nuts as weights to increase the lever resistance.