What is Difference and similarity between Electric Voltage and Current And Relation Between Them

INTRODUCTION TO ELECTRIC CURRENT AND VOLTAGE-

Welcome to this course on Basic Electrical Technology. In this post you will able to read and understand about the basics of electric current and voltage.

ELECTRIC CURRENT-

DEFINITION OF ELECTRIC CURRENT -

 "An electric current is the rate of  flow of electric charge in a circuit".OR Simply you can say that the current is the flow of electron in any conducting path or material. you can find in many books the current is defined by the vibration of electron.

EXPLANATION-

ELECTRIC CURRENT FLOWING IN A CONDUCTOR

Any movement of charge constitutes an electric current.here in this picture a piece of conductor of high resistance connected with a battery bank. the direction of current flow is shown by arrows. i.e +ve to -ve . And the direction of electron flow from -ve terminal to +ve terminal .

The charge carriers could be electrons in a vacuum, electrons in a metal, 'holes' in a semiconductor or ions in a solution.

Essentially, flow of electrons in an electric circuit leads to the establishment of current.

FORMULA OF ELECTRIC CURRENT

where,

➤  q :- relatively charged electrons (C)

➤  Amp = C/sec 

➤  Often measured in milliamps, 

UNIT OF ELECTRIC CURRENT        -  Ampere

SYMBOL OF ELECTRIC CURRENT - " I "

VOLTAGE OR POTENTIAL DIFFERENCE-

We define voltage as the amount of potential energy between two points on a circuit. One point has more charge than another. This difference in charge between the two points is called voltage. It is measured in volts,

The unit “volt” is named after the Italian physicist Alessandro Volta who invented what is considered the first chemical battery. Voltage is represented in equations and schematics by the letter “V”.  

UNIT OF ELECTRIC VOLTAGE        - Volt and millivolt

SYMBOL OF ELECTRIC VOLTAGE - "V"