Wednesday, 17 August 2016

electricity


 
 
 
 
Electricity : Movement of electrons is called electricity or current.
 
An atom is a collection of electrons, protons and neutrons. While protons and neutrons are constant in motion and reside inside molecule of an atom and electrons circulate among the molecule.
 
         electrons : Negatively charged
         protons : Positively charged
         neutrons : Acts neutral , no charge.
 
  • conductors: Conductors are metals which lets the heat/electricity pass through it like iron, bronze and steel. Metals let the electrons pass through one atom to another, so metals invites electricity or heat.
  • insulators: Insulators are non-metals which doesn't let the heat/electricity pass through it. Like wood, paper and plastic. Insulators won't let the electrons pass through one atom to another, so that electricity or heat restricted.
  • electricity is nothing but movement of electrons
     
    Thermoelectricity - uses coal as fuel to heat the water which produces the pressure that spins the turbine which in turn causes the induction motor to rotate.When magnetic field rotates inside an induction coil, electricity gets produced.
     
    Nuclear electricity - uranium used as a fuel to heat the water which produces the pressure that spins the turbine which in turn causes the induction motor to rotate.When magnetic field rotates inside an induction coil, electricity gets produced.
     
    Hydroelectricity - the heavy water from the dams causes the turbine to rotate which in turn produces electricity.
     
    Wind electricity -
    Solar electricity -
 
How electricity gets produced?
When you move a conductor through magnetic  field electrons start to flow. It's nothing but Electromagnetic induction.


You know this:
  • It's one amp of electricity enough to stop the heartbeat.
  • The spinning magnetic field causes the electrons to flow.
  • The protons and neutrons are identical in nucleus of an atom.
  • Nucleus in atom occupies 99% of mass,the remaining space in atom is empty
  • Electrons stay out of nucleus and having negatively charged gets attracted to protons having positively charged.
  • Parallel circuits are always provides more than one path for electricity to travel on.
  • Services circuits provides only one path for electricity to travel on.
  • Electrons are always move from negative to positive.
  • Short circuit - when a conductor connected from negative terminal to positive terminal it's gets heated in short time which leads burning.
  • One Mega Watt = Power consumed by 1000 homes

Why birds don't get electrocuted while budging?

Electricity flows along the path of least resistance. Birds don't get shocked when they sit on electrical wires because they are not good conductors of electricity. Their cells and tissues do not offer electrons an easier route than the copper wire they're already traveling along.


Understand how :

  • Power distribution grid works
  • Difference between three-prong outlet and two-prong outlet at homes - the three pins are neutral, hot and ground


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