Investigating the Resistance of a Wire
Introduction
My aim in this experiment is to investigate if the length of a wire
affects the resistance of electrons. The resistance is how hard or
easily electrons can pass through something. If they can pass through
easily then the wire has low resistance and if they cannot pass
through easily then the wire will have high resistance. Prior to
commencing my main experiment I will conduct a preliminary experiment
to help me decide what lengths to use and also to hopefully learn a
little about what I am doing before I start it.
Variables
There are many variables that can affect how much resistance there is
in a wire:
The length of wire can affect the resistance because longer wires will
contain more atoms to interfere with the passing electrons.
To increase or decrease the resistance I could also change the amount
of volts flowing through the circuit.
I could use a different wire, for example the resistance will vary if
a copper wire is used as opposed to a Nichrome wire. A copper wire is
a better conductor and has less resistance and the Nichrome wire has
more resistance.
The thickness of the wire can also affect the resistance the thicker
the wire is the more easily the electrons will flow through.
The temperature of the wire can also affect the resistance, if there
is thermal energy from heat the particles in the wire will start to
vibrate. These vibrations could interfere with the flow of electrons
through the circuit.
The variable that I am going to be using in my experiment is the
length of wire.
Equipment List
Voltmeter
Ammeter
Calculator, used to calculate the averages of the results.
Different lengths of wire - was represented with a wire on a 1 metre
ruler. The crocodile clips could be attached to the preferred length.
Crocodile clips on leads.
Power pack
[IMAGE]
The Particles in the wire
Using the electronic balance given, mass the copper wire and record it in the data table.
V is voltage in volts and I is current in amperes. L:- is the length
The Resistance of a Wire Investigation Aim: To investigate how changing the length of a wire affects the resistance. Prediction: I predict that the longer the piece of wire, the greater the resistance will be. This is because the current is resisted by the atoms in the wire. In a longer piece of wire, there would be more atoms for the electrons to collide with and so the resistance would be greater. The shorter piece of wire will have less resistance because their will be less particles causing less collision.
In conclusion, the wiring of the fly-by-wire installation involves electrically command control system which is implemented through the computer.
will be the length of the wire, the material of which the wire is made
Investigating the Resistance of a Wire We have been given the task to investigate the resistance of different wires, I am firstly going to start by explaining what resistance is, why it occurs, what causes it, and how it can be used to our advantages. Resistance is a term used to describe the property that various materials possess to restrict or inhibit the flow of electricity. Whether or not a material obeys Ohm's law, its resistance can be described in terms of its resistivity. The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional area, and would be expected to depend upon the material out of which the wire is made.
I tested all the wires at 3 volts, first I set up the equipment as
down to 0.20m long. I will not go above 1m or below 0.20m because it
V = I ´ R where V = Voltage, I = Current and R = Resistance
It began as simply an adventure into the woods in hopes of discovering some new exotic scene. To my surprise, there it was: a long strand of silver wire, dangling from the neighbor’s fence. I broke of a piece and began to play with it. I discovered it was very flexible yet easily cut-table. I reported this news to my older brother, and he too found interest in the wire. Being quicker in thinking, he decided right away he was going to bend the wire into a cross. (His final product ended up looking like a wiry dagger). I pondered for some time about what to make of my wire. I always liked things you can interact with rather than stationary objects. In Haiti (my home country) I remember constructing toy cars from cans and bottle tops. We would attach strings to them and happily drag them along. Recalling this experience, I decided to build a car; not a car controlled by being pulled by a
and displayed in SWG. I will be using copper wire of 14, 18, 22, 26
Step 2: I will attach a piece of thin wire to a meter long ruler.
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