Electricity Explanation with Examples and Complete Understanding about electrons flow - INDIA COVER

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Electricity Explanation with Examples and Complete Understanding about electrons flow


ELECTRICITY



Before discussing about Electricity we should know what is mean by electric charges.

What is mean by Electric Charges ?


Materials   -    Atoms    -     nucleus ( protons + neutrons )   -    Electrons


Explanation about how atoms responsible to electricity :



We know that, every materials are made of small particles are called as Atom.


The center part of the atoms is called as nucleus, and these nucleus consists of proton and neutron, here proton is positively charged and neutron is neutrally charged part.


And electron negatively charged part which revolve around the nucleus in circular orbits.


Electricity Definition :

From now, we came to understand that atoms has some charges that are present in electricity.


" Electricity is a form of energy that contains electric charges , which is from atom."


Unit of Electric Charges (q) : Coulomb.


The flow of Electric Charges is called as an Electric Current. Also called as flow of electric charge across the surface at the rate of one coulomb per second


I = q/t   ( Coulomb / Seconds )
I - Current
q - Charge
t - time


Unit of Electric Current is Ampere.


Example for Electric current Calculation :

If 60 Coulomb of electric charges flows through a wire in 4 minutes, calculate the electric current in the wire ?


t - 4 minutes ( 240 seconds )

q - 60 Coulomb


I = q/t


I = 60 / 240     =  0.25 A (Answer)


Measurement of Electric current : Ammeter is a device is used to measure electric current.

What is Potential Difference ( V )

We came to know that electric charges is used in the electric current, but not only the electric charges can make a wire connection , it need something to push the electric charges to form a electric connection, so potential difference is used to push the electric charges along the circuit.


Definition : The potential difference between any two points in the circuit is the amount of energy needed to move 1 unit of electric charge from one point to another point


SI unit of Potential Difference : Volt (V)


Measurement of Potential Difference : Voltmeter is a device is used to measure potential difference.


Resistance ( R )


An electrical resistance , which resists the flow of electric charges in a circuit. When we resist the flow of electric charges through the component, at the time high potential difference is needed to flow the electric charges.


Unit of Resistance is Ohm
"The relation between Potential Difference, Current, and Resistance "
V = IR

R = V / I ( higher the resistance in a component , the higher the potential difference needed )

Why Some Materials conducts electricity and some not 
Conductors 
Conductors are materials which are composed of loosely bound electrons  so the electrons are free to move through the material
A Good conductor is a material which has very little resistance and high electrical conductivity.

Insulators 

Insulators are materials which are composed of tightly bound electrons so the electrons are not free to move through the material, hence they are called poor conductors of Electricity. which has high resistance and low electrical conductivity.











India Cover Explanation of electric Current , resistence , potential difference and explanation

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