Investigating How the Length of the Wire Affects the Resistance of the Current Passing Through Wire
Aim
For this experiment, my aim is to investigate how the length of the
wire affects the resistance of the current passing through the wire.
Hypothesis and Scientific Knowledge
When electric current passes through a conductor, there is always a
resistance against it. The resistance varies between different types
of materials. Although all metals are conductors, some have a higher
resistance than the other. For example, copper has a low resistance;
whereas cobalt has a higher resistance.
As electrons flow through the wire, they are attracted by the nuclei.
As they are attracted, they collide with each other thus creating
resistance.
Factors affecting Resistance
The length of the wire; the thickness of the wire; the material it was
made from; and the temperature.
Theory Diagram
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To Work Out Resistance
To work out resistance we have used this formula
V / I = R
Ÿ V - Voltage
Ÿ I - Current
Ÿ R - Resistance
The ‘magic’ triangle above shows how voltage, current and resistance
can be worked out. To find out the VOLTAGE, we have to multiply
current by resistance. To find out the RESISTANCE, we have to divide
the voltage by current. We can also find out the CURRENT by dividing
the voltage by the resistance.
MY TEST
My Method (in brief)
I will work with a group of three people and we will find out how the
length of the wire affects the resistance of the current passing
through it. I will use a power pack, some connecting wires, a
voltmeter, an ammeter and a metre rule with a built-in nichrome
contact wire to do the experiment. Then I will draw a table and plot a
graph to show the results.
Predictions
Now, I have enough information to make my prediction based upon the
hypothesis in the previous page.
My team consists of four other people besides myself, Lauren Chojnaki, Alexa-Louise Patnode, and Jacobe Loewen, and Ryan Tyriver. Together, we are tasked with the mission to complete a stakeholder analysis regarding a specific organization and their structure. For this project to be completed successfully, it is important that all team members are able to cooperate with one another and are able to use their different strengths to create the best end product.
For this project you will be placed in an assigned group with no more than four members, you will not be allowed to change your group.
equation V = IR. V - volts, I - current and R - resistance. I plotted
I also decided to use a wooden block to keep hold of the wire, because
Before starting the university my working with others was sometimes effective and sometimes not very effective depending on the people I worked with, on the topic or area we had to work on. In sixth form I got on well with everybody in my class and working with them was not difficult. For example once me and two other students had to make a PowerPoint presentation on smoking. We worked together in planning what information will be included in the PowerPoint and who will write about what, what other materials we will need such as leaflets and who will get them. So before creating the PowerPoint presentation we planned everything together. Once the PowerPoint was created we then decided the number of slides each of us will read and talk about. So here I worked with others effectively and our PowerPoint presentation was successful.
In order to evaluate my role within the group, it is important to identify what makes a group. A group must firstly consist of more than three members, “Two members have personal relationships; with three or more there is a change in quality” of the personal relationship. (Bion 1961, p26) The group must have a common purpose or a goal in order to succeed. Having now completed my group work task, I can look back and reflect upon the process that my group went through to get to the presentation end point.
= F The circuit was set up as in the circuit diagram overleaf with a power source of 5 Volts, an ammeter, crocodile clips (holding wires). and a variable resistor in series and a voltagemeter in parallel with the wires. The sand is F Nickel chrome wire was then measured to discover the cross section. width with a micrometer screw gauge and this was recorded and the cross sectional areas were calculated using €r2 multiplied each time by the number of wires used, each bit of wire was cut into lengths of 30.
Engleberg, I., Wynn, D., & Schuttler, R., (2003). Working in Groups: Communication Principles and Strategies (3rd ed.) Boston: Houghton- Mifflin. pp. 146- 170.
Engleberg, Isa N. and Dianna R. Wynn. Working in Groups. 6th ed. Boston: Pearson, 2012. Print.
of the atoms, so if there are more or larger atoms then there must be
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.
The specimen must be regularly shaped in the form of a wire; its diameter. should be measured at six different points. Variables and Controls:. The variables that I will be using are the length and diameter of the
In my experience and in this small group project I would be one of the more vocal people. By avoiding intimidating or shutting anyone out, it is important to have each person brain write to avoid any hesitation from others. In my current small group, we partake in electronic brainstorming. Each of us sat down at a computer and found articles that we thought was best fit to the solutions to the problem. After finding our articles we then posted them to google docs where we are now in the process of evaluating them. This makes it easier for everyone to find articles that connects to them. When we tired of thinking of new ideas we take a brake and talk about each other’s lives. I like to as all my groups what we plan on doing over the weekend and we also do it in our class when (Dr. Davis) asks us how our weekend was or even what is happening this weekend, giving us a break from thinking about school related items so we can start fresh. Brainstorming is important to do and is the best way to come up with the best
our thought process, and how we contribute to the process of group work. This involves a
Working together with other people for an assignment can be a challenging task in some cases but luckily, I worked well with my group members. The decisions we made were anonymous although we paced ourselves individually when it came to completing our separate parts of the essay. As a group I believe that we connected well on an interpersonal level as all four of us were able to make alterations to any problem together . Furthermore, we did not give each other a chance to get angry at one another as we knew that this would only cause conflict that would disrupt our flow as a group. There was an equal divide in the amount of work that we all did; our contributions were fair and no one was lacking behind. In addition, my group members were great at keeping each other informed if one of us were not able to attend a group meeting; emails were sent out informing us what we missed and ideas that were formulated. Everyone in my group worked according to deadlines and in synchronization with each other; we did not have to nag anyone to complete work or wait on a member to complete their task.