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
However, metals can be quite hard to cut or shape into a desirable piece, requiring application of extreme forces. Depending on the project,
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voltage. But this method can be hard as you might not be able to know
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== = == Hypothesis for the experiment: After I conduct this experiment, I expect and suppose I can recognize and physical changes, identifying the difference these two kinds of changes. Also, I will be able to know some physical and chemical properties of copper (II) sulfate, water, iron, sodium carbonate, hydrochloric acid and magnesium and identify if it is a chemical change or physical change in each part of the experiment.
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