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Circuits

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									Static Electricity
AC & DC Currents
Series & Parallel Circuits
Ohm’s Law
 Static Electricity
 When something has a build up of electrons creating an
  imbalance in charges resulting negative static charge.
                 For extra understanding click here


          attract              repel
Opposites______. Like charges ______.
 Examples:




             carpet                               hair
  balloons                 doorknob                      lightning
 AC & DC Currents
Current = the flow or movement of electrons.
                            Definition   The source



                          Only goes



                        Both ways
                        (+ to -)
               AC vs DC
               Sort out the devices into
               their correct power supply   8.
1.
          4.
                               6.




     2.

                                             9.
          5.
                               7.

3.
Circuits
   Electricity travels from positive to
  negative charges. Opposites attract
  each other. When electricity is run
through a wire from a source and back
       again it is called a circuit.


+ -
Series Circuits
They all go out because the circuit is broken.




 + -
            What happens if
            this one goes
            out?
 Parallel Circuit
The others stay lit because the circuit isn’t broken.




  + -




What happens if this one goes out?
                    Ohm’s Law
The relationship between current, resistance, and
 voltage.
Fill in the chart     What is it?       Measured by

                       Flow of
                       electrons
                                        AMPS
                       Slows flow
                       of electricity   Ohm’s
                       Electric
                       “push”           Volts
      Ohm’s Law cont.



            V =cr
The current is 25 amps and the wire resistance is 5 ohm’s
what is the Voltage needed to run the motor?
     V= 25 x 5               V= 125 volts
  Electromagnets
A magnet can be temporarily made by
running electricity through a coil of wire
wrapped around a piece of iron.
Everyday Electromagnets
Pick the objects below that have an electromagnetic motor?




    Fan                              Motorcycle
                  Washer & Dryer
                                                      Drill
                                      Car

           Lawnmower
Doorbell                   Clock             Pencil Sharpener
 Moving Magnets make
     Electricity
When a Magnet is
spun inside another
magnet electricity is
generated.
Understanding
 Electricity?

								
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