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Gcse Physics Course Work (Resistance)

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Introduction

GCSE PHYSICS COURSE WORK (RESISTANCE) MY PLAN: My experiment will find if resistance paper obeys ohms law. I am going to investigate if length and width affect the paper in any way. MY AIM IS: My aim is to find out if the resistance paper obeys ohms law and to find out if the length and the width effect the resistance in any way, I hope to find of the width and the length effects in any way. THE TASK:I have been asked to investigate the physical properties of resistance paper, I have decided to concentrate on three main areas being the width, length, and if resistance paper obeys ohms law BACKGROUND SCIENCE: My background science is quite some use to me in this experiment because I know the definition of ohms law and I therefore look at my results and see if they affect ohms law and obey it the definition is: An electrical device in an electrical circuit obeys ohms law if the current in the device is directly proportional to the potential difference across, the device provided we have a constant temperature. ...read more.

Middle

LIST OF APARATUS: My apparatus will consist of: * A battery * Bull dog clips * Crocodile clips * Resistance paper * Two multi meters * 5-6 wires RESULTS OF EXPERIMENT: LENGTH (mm) RESISTANCE (?) 0.1 4.53 0.2 3.14 0.3 3.50 0.4 3.14 0.5 3.08 0.6 2.87 0.7 2.40 0.8 2.07 0.9 1.70 1.0 1.18 VOLTS (v) CURRENT (mA) 0.1 0.0 0.6 0.8 0.2 0.2 1.0 0.34 1.6 0.37 1.8 0.37 2.0 2.0 WIDTH (mm) RESISTANCE (?) 10 0.1 20 0.05 30 0.03 40 0.025 50 60 0.02 0.0 WIDTH (mm) RESISTANCE (?) 60 4.55 50 5.54 40 8.33 30 10.56 20 15.6 10 27.3 CIRCUIT DIAGRAM: ANALISIS OF THE RESULTS: These results confirm that my hypothesis was correct. My hypothesis says that the longer the wire so to speak or the resistance paper, the resistance paper when it is at its longest is when the most resistance is at its most and more resistance can be past through. ANALSIS OF GRAPHS: GRAPH 1(A graph to show current/potential difference when testing to se if carbon paper obeys ohms law) ...read more.

Conclusion

PRELIMINARY EXPERIMENT: Are preliminary experiment consisted of testing for ohms law in a resistor ii will include this graph and table in my project. IMPROVEMENTS ON EXPERIMENT: To improve my experiment with what I had to use would be very difficult, because I would need more precise equipment and more time to do the experiment I would also have liked if I could test for other things that might have effected the resistance paper in any way. If I were able, I would alter the temperature and alter the properties and the thickness of the resistance paper. However, I believe my experiment went very well. CONCLUSION: In this experiment I have found that resistance paper does obey ohms law and that when you decrease the width the resistance goes down. I also have found that when you decrease the length the resistance goes down. On my graphs, I had some anomalous results, which I knew were correct because the multi meter was very unstable and by the slightest knock, the resistance would change. However, I enjoyed my experiment and enjoyed finding out about new things in the physics and I thoroughly enjoyed the work and enjoyed performing the experiment. - 1 - ...read more.

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