Factors that Effect the Resistance to a Piece of Wire

Factors that Effect the Resistance to a Piece of Wire

Aim; My aim is to find out what factors (variables) effect the

resistance to a piece of wire.

Scientific knowledge; To work out the resistance I would use this

formula;

R= V

I

And to work out the current I would use this formula;

Folded Corner: Voltage (V) is measured in volts = V

Current (I) is measured in ammeters = A

Resistance (R) is measured in ohms = Ω

I

= V

R

Electricity flows through a wire which results in the free electrons

becoming active and moving vigorously within the wire.

The faster the free electrons move, the greater the force of the

impact with the ion particles, which results in a higher resistance.

Folded Corner: The more collisions, the higher the resistance.

The variables; The things that I can change in the experiment, but

still keeping it a fair test are;

* The length of the wire

* The thickness of the wire

* The shape of the wire

* And the type of wire that I shall use

The effect of changing the length of the wire will change the amount

of particles in the circuit therefore changing the resistance in the

wire.

The effect of changing the thickness of the wire is very similar to

the effect of changing the length of the wire in that if you increase

in the thickness of the wire you are also increasing the amount of

particles in the wire therefore, the resistance.

By changing the shape or the wire might not have any effect on the

resistance of the wire.

The effect of changing the type of wire that I use is obviously going

to have an effect on the resistance due to the density of the wire.

Prediction; I think that if the length of the wire is doubled then the

resistance would double, because there would be twice as much