I am conducting
this experiment to determine how a certain variable affects the resistance of a
piece of wire in a circuit. PLANNINGSafety To make the experiment safe I will: ·
Make sure the wire is not connected for long periods of
time. This makes the wire hot and destroys equipment. ·
Disconnect the wires should the ammeter reading go too
high.PredictionI predict that as the length of wire increases the
resistance will increase. This is because the electrons have further to travel
and lose energy. Equipment·
Power supply (0 ? 10v) ·
Ammeter (0 ? 5 Amps) ·
Digital voltmeter ·
Crocodile clips (x3) ·
Meter ruler ·
Nichrome wire (I metre) ·
Leads/connectors (x7) ·
Variable resistor Possible Variables ·
Length of wire ·
Voltage ·
Temperature of wire ·
Current flowing through wire ·
Width of wire ·
Type of wire (copper, steel etc) ·
Equipment in use (leads rheostat)To make the experiment a fair test I will vary only one
thing- the length of the wire. The current and voltage stay the same. The wire
will stay the same except for length. I will use nichrome wire in my circuit.I am going to measure the voltage from 10 cm to 100 cm in
10 cm increments. I will repeat the experiment 3 times in order to gain an
average result and use Ohm?s law to calculate the resistance.RESULTS TABLE Length
of wire 1 Voltage 2 3 Average
volts (V) Resistance R=V/I (W) 0 0 0 0 0 0 10 0.35 0.33 0.35 0.34 0.17 20 0.65 0.65 0.66 0.65 0.33 30 0.99 0.98 0.97 0.98 0.49 40 1.3 1.4 1.3 1.3 0.65 50 1.66 1.65 1.67 1.66 0.83 60 1.98 1.98 1.99 1.98 0.99 70 2.29 2.29 2.27 2.28 1.14 80 2.65 2.64 2.65 2.65 1.33 90 2.97 2.95 2.96 2.96 1.48 100 3.28 3.29 3.30 3.29 1.65 ANALYSIS AND CONCLUSIONSFrom my graph I can see that the straight line indicates
that the length of the wire is proportional to the resistance.As the length of the wire was increased the resistance
also increases. This is because the current is made up of electrons. The
electrons lose energy the further they have to travel. Also, as the wire gets
hotter, the resistance increases because the atoms in the wire vibrate more and
this makes it difficult for the electrons to pass through the wire.I can now say that my prediction ?as the length of the
wire increases the resistance will increase? is supported by my results. EVALUATION I obtained my results by setting up the circuit show in
the diagram on the previous page. I moved the crocodile clips in 10 cm
increments and read the voltage off the digital voltmeter. I repeated the
experiment twice more and then calculated an average voltage. I then calculated
the resistance by dividing the current (2 amps) by the average voltage. This
method of calculating resistance is known as Ohm?s Law.From my graph, I can see that my results were accurate.
All the points are very close or on the line of best fit in a positive
correlation. There were no anomalous results.?As I obtained
accurate results, I think that the method I used was suitable. However, there are certain improvements I could make to
improve the accuracy, namely:·
Making sure the wire is straight so measurements could be
taken accurately. ·
Making the wire straight would enable more accurate
positioning of the crocodile clips, which again would give more accurate
results. ·
Letting the wire cool down sufficiently in between
readings. When the wire heats up, it has lots of energy, which causes the atoms
in it to vibrate, making it harder for the electrons to travel. This increases
the resistance via another method, so it is not a truly fair test.?As I have
previously stated, my results have a good standard of accuracy. This is shown
by the points being near or on the line of best fit and there were no anomalous
results. Therefore my results support a firm conclusion that the length of wire
is proportional to the resistance.
Другие работы по теме:
College Level Physics Essay Research Paper I
College Level Physics Essay, Research Paper I feel the future of transportation lies in space travel. People can go any where in the world and can do anything but travel in space. This is do to the incredible cost of space travel. The use of massive amounts of fuel for departing and re-entering the atmosphere contributes a high percentage of the cost.
Physics Project Plan Essay Research Paper Physics
Physics Project Plan Essay, Research Paper Physics Project The Planning Key V A ????? Variable resistor ??????? Ammeter???????? Light bulb??????? Voltmeter ???????? I am carrying out an experiment to
Electrical Meter Loop Essay Research Paper How
Electrical Meter Loop Essay, Research Paper How do you hook up an electrical Meter loop? How do you hook up an electric meter loop? An electric meter loop is the service entrance where the electricity feeds the home from the transformer on the pole. Therefore it is one of the most important necessities to the home.
Antibiotic Resistance Essay Research Paper Antibiotic ResistanceAntibiotic
Antibiotic Resistance Essay, Research Paper Antibiotic Resistance Antibiotic resistance occurs when bacteria that cause infection are not killed by the antibiotics taken to stop the infection. The bacteria survive and continue to multiply causing more harm. Widespread use of antibiotics promotes the spread of antibiotic resistance.
Resistance And Length Of Wire Essay Research
Paper IntroductionElectric charge on an object is often called static electricity. Objects charge up because they gain or lose electrons. The electron is the smallest part of the atom. The electron
Nylon Essay Research Paper THE NYLON POLYMERWHO
Nylon Essay, Research Paper THE NYLON POLYMER WHO?, WHAT?, WHEN?, AND HOW? OF NYLON Nylon was one of the first commercial polymers ever developed. It was first invented by a team of chemists at the Du Pont de Nemours and Company research facility in the 1930 s. This team was led by Dr. Wallace Hume Carothers. The goal of nylon was to create a polymer that was easily made into fiber form.
Does The Resistance Rate Depend On How
Much Constantan Wire Is In The Circuit? Essay, Research Paper Aim The aim of this experiment is to investigate or find out how the resistance of a wire is affected by different
Investigating The Effect Of Resistance On Wires
Essay, Research Paper I am going to be studying the resistance of wire. The purpose of this investigation is to see how length and thickness of wire affect the dependent variable, resistance. Prediction
Electromagnetism Investigation Essay Research Paper Physics
Electromagnetism Investigation Essay, Research Paper Physics – Electromagnetism Planning Previous Scientific Knowledge. When insulated wire is wrapped round an iron nail and the ends of the wire are connected to a battery the nail becomes capable of picking up iron filings and paper clips. This is called an electromagnet.
Outside Plant Essay Research Paper Outside PlantOutside
Outside Plant Essay, Research Paper Outside Plant Outside plant is the network of cables, poles, conduit, feeder cable, distribution cable, terminals, aerial and drop wire, and fiber optics that interconnects CO’s and connects from the local CO to the home or customer. The local loop or last mile is the link between the CO and the customer.
Antibiotic Resistance Essay Research Paper Darwins theory
Antibiotic Resistance Essay, Research Paper Darwin?s theory of evolution can be explained like this; the environment acts as a selective agent, weeding out organisms less able to survive. Darwin described natural selection as a process in which organisms become better adapted to their environment. The organisms that evolved with beneficial variations are more likely to survive and reproduce, they pass on the favorable genetic material.
Life Essay Research Paper Both violent and
Life Essay, Research Paper Both violent and non-violent resistance are major themes in the movie The Mission. Even tough the Jesuits are peaceful of God they used both violent and non-violent resistance in this story to stand for what they believe in. Violent protest is aggressive and commanding while non-violent resistance is truly standing up for something.
Holocaust Essay Research Paper Holocaust
Holocaust Essay, Research Paper Holocaust Essay submitted by Yogi36@mailexcite I’ve thought, and thought about resistance in the Holocaust and I’ve come to this
Fiber Optics Essay Research Paper HistoryETek Dynamics
Fiber Optics Essay, Research Paper History E-Tek Dynamics was founded in 1983. The company started out as a research and development firm for the Department of Defense and NASA. E-Tek started with only a few typewriters and a few hundred dollars; little did they know that the company was on its way to being one of the leaders in communication.
Thank God For Believers Essay Research Paper
A single lie entangled my thoughts with confusion, Like rumors through a hallway, the lie continues to grow. Now spun is a web of wire. I dread the day of truth and innocence.
Physics Investigation
– Resistance Of Wire. Essay, Research Paper Aim: -To find out what factors affect the resistance of a wire (besides current of temperature.) We must use two different variables. Variables: -VariablesChosen Variables Length of wire. Thickness Type of wire.Chosen Variable: -I have chosen length of wire as one as my variables because it will give me a good range of results.
Resistance Investigation Essay Research Paper Physics Investigation
Resistance Investigation: Essay, Research Paper Physics Investigation Of Resistance Aim: to investigate how the electrical resistance of a wire changes in relationship to itґs length. Prediction: I think that as the length of the wire increases so to will the resistance of it. I also believe that the rate at which the resistance of the wire increases will be directly proportional to the length.
Article Review Essay Research Paper REFLECTIONI read
Article Review Essay, Research Paper REFLECTION I read the article “High-Wire ACT,” by Meg Lundstrom featured in the May/June 2000 issue of Scholastic Instructor. In the article, a fourth grade teacher from a New York elementary school explains how her students have been successful in reading class. She says that phonics and literature need to be taught to all students.
DDay 2 Essay Research Paper DDay On
D-Day 2 Essay, Research Paper D-Day: On June 6, 1944 it came at last. What all occupied Europe had long been waiting and praying for: the Allied invasion. In London Pieter Gerbrandy, the man who
Bacterial Resistance Essay Research Paper Bacterial resistance
Bacterial Resistance Essay, Research Paper Bacterial resistance is a problem that has profoundly impacted the medical community. Bacterial resistance results when bacteria become resistant to individual antibiotics through the development of specific defense mechanisms which render the antibiotic ineffective.
Douglass Essay Research Paper DouglassIn Frederick Douglass
Douglass Essay, Research Paper Douglass In Frederick Douglass? writings I learned that his physical struggles and his writing as resistance are nearly parallel. When Douglass is living in Baltimore with the Auld family, Mrs. Auld began to teach him the alphabet. After this was discovered by Mr. Auld, the teaching ceased, and Douglass was carefully watched to be sure that he was not reading when alone.
Super Conductors Essay Research Paper I INTRODUCTION
Super Conductors Essay, Research Paper I. INTRODUCTION: Superconductors An element or compound that will conduct electricity without resistance below acertain temperature is a superconductor. This applies only to direct current electricity andto limited amounts of current. Once it is set in motion the current will flow forever, in aclosed loop of superconducting material.