Facts Facts Facts !

Hi there. Today in class we completed our Ohm's Law experiment and came up with very interesting outcomes. Tonight's assignment is to write down ten interesting and useful fact from pages 553-563. So here they are.

• Current flow in a circuit depends on two things. 1) Potential difference of the power supply. 2) the nature of the pathway through the loads using the potential energy.
• Resistance is that the more difficult the path, the more opposition there is to flow. Resistance is the measure of the flow. Resistance is measure in volts/ampere which has the unit of ohm. Therefore
• There are many factors that affect resistance, for example the thickness of a wire, length, cross-sectional area, the material it is made of and the temperature of the object. Here is a chart from our book (pg 557) that shows the factors that affect resistance.
• Superconductivity is the ability of a material to conduct electricity without it losing heat.
• Kirchhoff's current law states that the total amount of current into a junction point of a circuit equals the total current that flows out of that same junction.
  
• Kirchhoff's voltage law says that the total of all electrical potential decreases in any complete circuit loop is equal to any potential increases in that circuit loop.
  
• His laws are related to the laws of conservation of electric charge and the conservation of energy.
  
• The resistance in series is that as current passes through more resistors, the voltage decreases as it passes each resistor. The sum of the voltage drop gives the overall voltage drop in the circuit.
  
• The total current must split and distribute itself amongst all of the circuit paths, in a parallel circuit.
  

• Three way light bulbs can have three different light intensities. The filaments are connected in parallel and can be turned on separately or at the same time, producing different intensities.

This is all the notes for tonight.
Goodbye!

-Peggy.