basic knowledge about VOLTAGE, CURRENT, and OHM'S LAW


basic knowledge about VOLTAGE, CURRENT, and OHM'S LAW 
What is VOLTAGE......!?

    Electric potential difference between two point, called voltage.
For more understand see picture. In picture you can see point A have charge and point B have no charge. So potential difference create between point A and point B.


        - Voltage is also know as Electric tension or Electric pressure or Electric potential difference.


          now how potential difference create?

electric potential is cased by.......

  • Static electric field
  • Electric current though magnetic field  or
  • Time varying  magnetic fields
Volt came from Italian physicist, chemist, and a pioneer of electricity and power ,Alessandro Giuseppe Antonio Anastasio Volta.

 SI unit of voltage is v.


What is CURRENT..........!?

 Simply  Current is flow of charge in electric circuit.

Here mostly charge is electrons.

charge also be ions (in case of electrolyte) or ions and electrons both (in case of ionized gas(plasma)).

SI unit of current is Ampere(coulomb per second).

 Ampere came from French mathematician and physicist, considered the father of electrodynamics André-Marie Ampère.

 Flow of electrons is negative(-) to positive(+) and flow of positive charge is positive(+) to negative(-).


What is OHM'S LAW..........!?

Statement :- 
                     Current through a conductor between two points is directly proportional to potential difference across that two points.

                                                                  V  ∝  I
then                                      
                                                            V  =  I R 
                                                                                here R = constant = resistance.
                                                                                        V = voltage
                                                                                         I = current

                                                      



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