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...