Electricity rough outline 

Nature of  Electricity

1. What is Electricity?   The movement of electrons   

2.  3 Qualities         Flow, Force, Resistance

Circuits  

3.  Pathways for electrons. Electrons flow from - to +

4.  Series & Parallel

5.  Conductors & Insulators            

6.  Problems


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7.  

 

Ohms Law

V=C*R        

8.  Problems

Ohm's Law determines the result of changing voltage, current, or resistanceNumerical Demo of Ohm's law

Magnetic Fields  

An electric current creates a surrounding magnetic field

Induction:  An electric current in one wire creates an electric current in any neighboring wire.  

Transformers

An electric current in one coil of wire  creates an electric current in an adjacent coil. The relative number of loops in each coil determines the current and voltage in the 2nd coil. 

Power in = Power out  A*V = A*V     Ratio of the loops

Solenoids aka relays

 How Relays Work           Doorbells 

A relay is an electrical switch that opens and closes under the control of another electrical circuit. In the original form, the switch is operated by an electromagnet to open or close one or many sets of contacts. It was invented by Joseph Henry in 1835. Because a relay is able to control an output circuit of higher power than the input circuit, it can be considered to be, in a broad sense, a form of an electrical amplifier.

     

Buzzer        Chime

Electric Motors 

 

Generators

Generator Principle:  

"A wire cutting through a magnetic field makes Electricity"

 

Generator    Crash Course in Wind Turbines ->

Generator Principle Applet.Generates voltage AC or DC as a model

 

Power  W=A*V

 

The Grid

 

Electricity is transmitted from its generation source to where we use it.  This path is called the Electric grid.





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Sound

  Buzzer