An Investigation into Factors Affecting Resistance of a Wire
Plan:
The possible variables I could use to find out factors affecting
resistance are material wire is made of, length of wire, temperature
and cross sectional area of wire. I will use cross sectional area of
wire and length of wire because I think it will be hard to draw
conclusions from the material of wire. I am not doing temperature
because it would be hard to get results from and I think they wouldn't
be as accurate.
I will set up a circuit to find out how length and cross sectional
area affect resistance.
I will need the following components in my circuit to gather all of
the necessary results:
· Component holder- So I can change the wire that I am testing.
· Voltmeter- Measuring potential difference across the wire, it will
have to be across the wire and not just anywhere in the circuit so it
is measuring the P.D across the wire I am testing only.
· Ammeter - measuring current of the circuit, with his and the
voltmeter I will be able to work put resistance (R=V/I). As a safety
consideration I will keep the Current under 0.5 amps, so the wire
doesn't get too hot.
· Rheostat- So I can vary the voltage in the circuit to take two
readings for each wire at different voltages, I will work out an
average of the two to reduce the margin of error.
· Switch- A safety consideration, so the wire doesn't overheat and
burn if the circuit is left on for too long.
I have decided to test length of wire at, 10cm, 30cm, 50cm, 70cm,
90cm, 110cm, 130cm, 150cm and 170cm keeping a constant cross sectional
area of 0.028mm2. I will test cross sectional area at the Cross
sectional areas of wire: 0.028 mm2, 0.045 mm2, 0.057 mm2, 0.113 mm2,
0.166 mm2 and 0.246 mm2, keeping a constant length of 50cm. My
preliminary work reviled that these were the best constants, and
Check the voltage setting on the power supply. Change it to the correct voltage for your location if necessary.
raising the power back up to 100%. He tried to explain that there could be
From this I can tell I can use 3 volts and resistance wire that is
moving the magnet past the wire. It will show up better on a meter if
In recent years there has been a growing trend involving the use of closed circuit
the nail. We then switched on the power supply and set the voltage to 4 V. We tested the number of paper clips the nail would pick up, each. time turning the power supply off and winding the coil five more times.
I also decided to use a wooden block to keep hold of the wire, because
that circuit, it was his, and he made sure that it was his by beating
F Another wire, or exact same properties (Nickel Chrome, thickness 34). mm and length 30cm) was placed on top of the previous wire, in the same position, both straight and flat. F. The power was turned on again and the same procedure was repeated. recording current and voltage at three points on the variable. resistor.
of the atoms, so if there are more or larger atoms then there must be
In conclusion, the wiring of the fly-by-wire installation involves electrically command control system which is implemented through the computer.
Factors Affecting the Resistance of a Wire The aim of this experiment is to investigate one factor that affect the resistance of a wire. I will do this by performing an experiment. First I will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has.
... spring, you are causing a twisting motion all the way down the coil. (Longhurst)
Introduction: I chose this topic; because I thought it would be fun to make a four-way switch that turns on the same light. I got the idea to make one when I went online to search for the perfect project idea. I found information about a three way light switch and decided that this is what I want to do, but to make it more difficult I decided to create a four way light switch instead. It sounds like the perfect experiment to try. I felt that if I did this project I would learn more about electricity and the way it works. What is a four way light switch? A four way light switch is an electric switch that uses electricity to power a light bulb that can be turned on by four different places and not just one or two. The great thing about a four way light switch is that there can be more then one way to turn on one single light. In order to achieve the perfect four ways light switch the four-way switch must be in the center of two three light way switches in order for the whole proses to work. A hot wire or wire of 120 volts will connect from a battery to the light bulb. A wire that is neutral will also be connected from the battery to the light bulb. The third wire can’t be neutral or 120 volts (hot wire) and will just float near the 120-volt wire. The third wire that is neither neutral or 120 volts, and 120 volt wire will connect when the switches are turned on and will produce the light. When the light will be turned on the switches should be one circuit in order for the light bulb to turn on and the electrons to travel through the circuit. The switches must be either up or down at the same time in order for the electricity to flow. If one of the switches is up and the other is down the light will not work. If one o...
often done by electrical discharge in a pure gas - or gas mixture - in a tube.