Basics Of Electricity Flashcards
Substance or materials used to convey or allow the flow of electrcic current
Electric conductors
Positive charge with a mass of 1.67x10^-27 kg
Proton
Negative charge with a mass of 9.107 x 10-³⁹
Electron
A body is said to be charged, if it has an either an excess or deficit of electrons from its values due to sharing.
Electric charge
Unit of electric charge
Coulomb
Source of Electricity
By the action of friction between two materials
Friction
Sources of Electricity
Through batteries which generates a different or potential means or chemical reaction s
Chemical action
Source of Electricity
Two dissimilar metal bonded together in a junction when heated exhibits a difference in potential e.g thermocouple wire
Heat action
Source of Electricity
Photo cells
Light action
Source of Electricity
A difference of potential across the faces of certain crystals such as quartz
Pressure
The capability of doing work
Electric potential
The capability of doing work
Electric potential
Causes electron movement
Volt
The measure of electric current, 63x10⁷ electrons passing a given point in 1 sec
Amperes
The best known conductor of electricity, but reacts with air and water (disintegrated) and make then useless for making connections in an electric circuit. The choice is based on the lowest resistance per unit length
Cesium
Best conductor to use but high cost prevents if from being commonly used except for switch contacts
Silver
The usual choice for conductor on commercial scale
Copper
The next best choice by manufacturers of electric wire and cable. Lighter in weight than the copper
Aluminum
All non conductors of electricity. Examples include glass, mica, porcelain, paper, aur
Insulators
Rate of converting energy, it is the product of voltage and amperes and is the measured in watts
Power
It is the factor by which the voltage-ampere product must be multiplied in order to obtain the actual power. It is never greater than 1. The value depends on the kind of opposition offered.
Power factor
An atom or molecule which is not electrically balance but electrically charged.
Ion
Electrical pressure that causes the electron to love through a conductor (wire)
Volt or voltage
Amount of Current flow. It is the standard unit in measuring the strength of an electron
Ampere
Rate of measure of power used or consumed
Watt
Sure installation that supplies current to lights and convenient outlet
Circuit
Opposition to the flow or current by the wires and transformer
Resistance
When potential difference between two charges forces a third charge to move, the charge in motion is called ___
Electric current
Unit charge of flow equal to one coulomb of charge past a given point in one second.
Ampere
Resistance offered by a unit cube of the material
Resistivity
A measure of the materials ability to conduct electric current
Unit : mho or Siemens (S)
Conductance
