Aim:

To measure how the length of a wire affects the amount of resistance when an electrical current is passed through it.

Background Information:

What is an electrical current"

When a full circuit is created (i.e. a continuous loop has been made connecting the negative end of an electrical source to the positive) it creates a path for electrons to pass through. These electrons need a "push" factor to make them move. This push is called the Voltage. Once the electrons are moving this "flow" factor is called the Current and can be measured by the uppercase letter "I" or the symbol "A" (Amps).

What is resistance"

Resistance is the opposition or conflict that a substance offers to the flow of electricity - current. This means that substances that are insulators will generate more resistance than substances...