Kirchoff and Resistance

In Monday's class  we started by watching Krystle's Prezi presentation and then reviewing what was learned on Friday.
We then started to learn Kirchoff's Current Law which states that:

1. The current is conserved in a series circuit  I1=I2=I3=IT
   2. The total current in a parallel circuit is the sum of the current through each resistor connected in parallel.  I1+I2+I3=IT
   We also learned Kirchoff's Voltage Law which states:
   
   1. In a series circuit the total voltage is the sum of the potential difference across each individual resistor   V1+V2+V3=VT
   2. In a parallel circuit the voltage is conserved and the potential drop across each resistor in parallel is equal to the total voltage. V1=V2=V3=VT  
   In this class we also started to learn about Electrical Resistance which affects the amount of current drawn from and electrical energy source.

          The resistance of an appliance depends on the conductor within it and the resistance of the conductor depends on these four things:

1. Length- more length=more resitance
2. Thickness- a thicker wire has less resistance than a skinnier wire
3. Temperature-hot=more resistance cool=less resitance
4. Nature of the Material- different substances provide different resistances

         Finally we learned the formula to calculate resistance

          R=p(L/A)                   R= Resistance

                                                      p= Resistivity
                                                      L=Length
                                                     A=Area

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