Resistance of a nichrome wire Essay Example

Resistance of a nichrome wire Paper Introduction In this piece of coursework I aim to find the effects of length on a piece of nichrome wire. Resistance is a force which opposes the flow of an electrical current, this is why energy is needed to push the particles around. The circuit also contains its own resistance if the wires vary in thickness, a thin wire has a high resistance as there is less room for the particles to move and a thick wire has a low resistance because the particles can move around very easily. Its also measured in ohms. George Ohm discovered that the emf (Electro motive force) is directly proportional to the current, this means if you double one you double the other. He called this resistance; the formula for working it out is as follows- Resistance = Volts Current Prediction I predict that as the length increases the resistance will also increase in proportion to the length, my graph should also show that they are proportional this is from my scientific knowledge that says. Nichrome wire conducts electricity very well and because current is the movement of atoms through the wire, if the wires length is doubled so is the number of electrons which will double the resistance. Predicted graph- How am I going to do it? Materials 1. Power pack 2. Rheostat 3. Volt meter 4. Ammeter 5. Nichrome wire 6. Wires 7. Crocodile clips 8. Sellotape The wire was sellotaped to a metre rule with excess at both ends for the crocodile clips to be attached. The rest of the equipment was assembled as shown in the diagram below. We will write a custom essay sample on Resistance of a nichrome wire specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Resistance of a nichrome wire specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Resistance of a nichrome wire specifically for you FOR ONLY $16.38 $13.9/page Hire Writer I chose to take the readings in ten 10cm gaps. I placed a crocodile clip at each measurement and record the resistance three times for an accurate average and then put the averages on a graph. Circuit diagram Results table To make sure of a fair test I am going to do the test 3 times and then plot a mean on a graph. Length Pd(v) Current (I) Resistance(V/A) 3 Length Pd(v) Current (I) Resistance. From all these results a mean was worked out. Length Resistance What do they mean? Without a graph its hard to tell below is a graph of the results Conclusion The graph is a straight line and passes through the origin, this indicates that resistance is directly proportional to length. This means that if the length is doubled then so is the resistance Evaluation From my graph I can see that my results that I collected are very reliable. I know this because my graph does not show any anomalies, this is because the graph is a straight line with no bulges or severe direction changes. There are several changes I could make to ensure better results were gained. When I was measuring the lengths of wire, my measurements might have been inaccurate, as the rulers used might be slightly varied and not exact. It was difficult to get an accurate reading of length by eye, as the wire was not completely straight or flat, these could have caused slight variations in my results. But not affected them too much. Other variables that could be changed are * Temperature of the wire * Diameter of the wire Overall the experiment went well and my results were good, and clearly prove my hypothesis. 1 5 1 Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

How to Use Comps Counseling Essay Samples

How to Use Comps Counseling Essay SamplesComps counseling is a type of essay that can be used for college admissions, whether it's a writing for your own college admissions essays or for an essay for a college essay competition. This kind of essay might be quite different from a standard college essay. Writing this kind of essay requires you to apply some techniques that can be found in essay samples.A good essay should be written in such a way that makes the reader feel that they really care about the subject. The best essays come from the heart. This doesn't mean that the author should have emotions; it just means that he/she should be able to put the knowledge that he/she has acquired in a way that will make it enjoyable for the reader. This is what comps counseling can help with.The first and most important parts of any essay are the introduction and the conclusion. You can use comps counseling essays samples for help on how to write these parts of your essay. Comps counseling ex amples will teach you how to provide information that will appeal to the reader.While writing the introduction, you have to be careful about using a common format. You don't want to go too elaborate about the subject. However, you should still make sure that your introduction is concise and to the point.The next two important parts of any essay are the body and the conclusion. These parts are very important because it is here where you will be able to determine whether the person receiving your essay likes it or not. You should keep the conclusion as short as possible. You can use comps counseling essay samples as a reference for how to write your conclusion.Remember that the body of your essay has to be interesting enough to keep the reader's attention. This is why you have to be careful about including too much information in your body. However, you should make sure that you are using a consistent style throughout your body.In your essay, you should also make sure that you put som e kind of humor in there. Many times, people tend to skip over this part, but it's actually very important. By using a comm counseling essay samples, you will be able to make sure that you don't miss this section.Finally, your conclusion is the last part of your essay. Here, you should provide some kind of reason why the reader should choose you over another applicant. Again, the best way to do this is by using a comm counseling essay samples.

A Study Guide for Act 3 of Hamlet

A Study Guide for Act 3 of 'Hamlet' If youve never read Shakespeare, reading Hamlet, the bards longest play, may be a daunting task, but this breakdown of all the scenes in Act 3 can help. Use this study guide to familiarize yourself with the themes and plot points of this pivotal part of the tragedy. Doing so can help you know what to look for as you read Hamlet in class or on your own at home.  If youve already read  the drama, use the guide to review any developments that you need to better understand or overlooked the first time around. If youre preparing to take a test or write a paper about Hamlet, be mindful of what your teacher has said about the play in class. Highlight any theme or plot development you think you can use to support a thesis statement or expound upon in a persuasive essay. Act 3, Scene 1 Polonius and Claudius arrange to secretly watch a meeting between Hamlet and Ophelia. When they meet, Hamlet denies any affection for her which further confuses Polonius and Claudius. They decide that either Gertrude can get to the root of Hamlet’s â€Å"madness† or he will be sent to England. Act 3, Scene 2 Hamlet directs the actors in a play to depict his father’s murder, as he hopes to study Claudius’ reaction to this. Claudius and Gertrude leave during the performance. Rosencrantz and Guildenstern inform Hamlet that Gertrude wants to speak to him. Act 3, Scene 3 Polonius arranges to secretly listen to the conversation between Hamlet and Gertrude. When alone, Claudius speaks of his conscience and guilt. Hamlet enters from behind and draws his sword to kill Claudius but decides that it would be wrong to kill a man while praying. Act 3, Scene 4 Hamlet is about to  reveal Claudius’ villainy to Gertrude when he hears someone behind the curtain. Hamlet thinks it is Claudius and thrusts his sword through the arras – he has killed Polonius. Hamlet reveals all and speaks to the ghost. Gertrude, who cannot see the apparition, is now convinced of Hamlet’s madness. Wrapping Up Now that youve read the guide, review the plot points. What did you learn about the characters? What are Hamlets intentions? Did his plan for Claudius work? What does Gertrude now think of Hamlet? Is she right or wrong to have these views? Why does Hamlets relationship with Ophelia appear to be so complicated? As you answer these questions and inevitably think of your own, jot them down. This will help you remember how the scenes of Act 3 unfolded and help you categorize the information in a way that may make it easier for you to come up with an outline for an essay or similar assignment on Hamlet. Take the same approach with the other acts in the play, and you will have organized the plot developments into a very handy study guide.