Testing the theory that increasing the length of a piece of wire increases the resistance.

Aim:

My aim in this experiment is to investigate how the electrical resistance of a wire is affected in relationship to the length of that wire

Factors affecting resistance these include:

· Diameter or thickness of wire
· Temperature at which wire is kept
· The material from which the wire is made.
· The length of the wire
In my experiment I will only be investigating one factor which is the length of the wire. The wire I am using is made out of nichrome.

Background information:

Resistance controls the amount of current flowing through a particular component in a circuit. Resistance slows down the current. Current is defined as the rate of flow of electrons through a circuit current is measured in amps. A circuit can only possess a current if there is a voltage across a component. The voltage is the force that is exerted onto the electrons to allow them to flow through the circuit. In 1826 a German physicist called George Ohm discovered a new rule which said t...