Investigating Which Factors (Variables) Can Change the Resistance of an Electrical Wire.

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INVESTIGATING WHICH FACTORS (VARIABLES) CAN CHANGE THE RESISTANCE OF AN ELECTRICAL WIRE.

                                                                                                                                                                                                                                                                                                

INTRODUCTION.                                                                                                           I have found the four main variables that can effect the resistance of an electrical wire. The four main variables are,                                                                                                                                                        1) THE LENGTH OF THE WIRE.                                                                                                                                                        2) THE THICKNESS OF THE WIRE.                                                                                                                                                        3) THE TEMPERATURE OF THE WIRE.                                                                                                                                                4) THE MATERIAL OF WHICH THE WIRE IS MADE OUT OF.

                                                                                                               

The best way for me to investigate the resistance is by using a famous German scientist's method, George Ohm's. The method is now known as the OHM'S LAW. Which is:                                                                                                                 RESISTANCE = VOLTAGE _                        R= V                                                             CURRENT                                          I                                                                                                                                             

The variable I will investigate is "How the length of the wire can effect the resistance of the wire".                                                                                                                                                                                                                

PREDICTION.                                                                                                     I have read many textbooks and researched into the variable I'm going to investigate on the Internet and after all this my prediction is. The bigger the length of the wire the higher increase of resistance.                                                                                                                                                                                                                                                                                           

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SCIENTIFIC REASON.                                                                                                               The electrons combining or running into each other with the ions in a conductor cause resistance. When this happens ions lose their energy. The resistance is much higher on a long wire because it has a longer length to travel across and it runs into more ions on the way. This causes resistance to occur and the best way to find the resistance is to use the ohm's law.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                APPARATUS.                                                                                                    A ONE METER RULER.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           A LONG THIN RESISTANCE WIRE.                                                                                                                                                                                                                                                                                                                                                                                                                                                               A ...

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