In this Article, you will learn Very Basic Electrical Terminologies and concepts of Electrical Engineering that will help you in your knowledge. there are some Basic Electrical Concepts and Terminologies

## Basic Electrical Concepts

Electron Flow Theory:  It defines current as the flow of electrons from negative to positive.
Conventional Current Theory: defines current as the flow of electrons from positive to negative.
DC or Direct Current: current is in one direction only.

AC or Alternative Current: current continually changes direction.

Voltage: It is a difference of potential that generates current, is a force that moves electrons.
electric force(E), electromotive force (EMF).

• Amount of electrical force that uses how much energy to move a per charge.
• One ohm is the amount of resistance that limits current to one ampere
when one volt of electrical force is applied.

Conductor: The have very low resistance(R) , they can conducts with very little applied voltage, copper, silver, aluminum.

Insulator: The have Extremely high resistance(R), they can conduct only when an extremely high voltage is applied, rubber, teflon, mica.
Semiconductor: Midway between conductor and insulator, limits current at a given voltage, graphite, silicon.

Conductivity: The ease with which an element or compound conducts electricity.

• The fewer valance shell electrons, the easier to force the atom to give up free electrons.
• The best conductors contain one valence electron per atom.
• With more atoms per unit volume, a given voltage generate more free electrons.
• Insulators blocks current, has complete valence shells (8 electrons ), relatively few atoms per volume.
• Semiconductors’ valance shells are half complete (4 electrons), relatively high number of atoms per volume.

Learn about Ammeters and Voltmeters.

Learn about LED Light Emitting Diode.

Learn about Arduino The Micro-Controller.

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