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AIM: TO INVESTIGATE HOW THE ELECTRICAL RESISTANCE OF A WIRE CHANGES IN RELATION TO ITS LENGTH

Gabriella Blake
AIM: TO INVESTIGATE HOW THE ELECTRICAL RESISTANCE OF A WIRE CHANGES IN RELATION TO ITS LENGTH

PLAN

Introduction and background research
· Resistance can be found using the equation
Resistance = voltage
current
· It is measured in Ohms (Ώ)
· Ohms Law states that the current (I) through a conductor is directly proportional to the voltage (V) across the conductor and inversely proportional to its resistance.
· The resistance of a wire is effected by: -
Ø Length
Ø Diameter
Ø Temperature
Ø Type of metal
Ø Cross-sectional area
· In a conductor, some electrons break away from the atoms. These electrons move freely inside the conductor. When there is a voltage across a conductor, all of the free electrons arrange themselves in lines moving in the same direction. This forms an electrical current. Resistance is come across when the charged particles that make up the current...