Tuesday, June 9, 2020
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I am going to do an experiment to measure how the number of coils of insulated wire around the iron core effects the amount of paper clips attracted to the electromagnet.These are the things that could affect my results - weight of the paper clip, number of coils, shape of the core and the material it is made out of, the size and age of paper clip and how old the nail is. If I didn't keep these variables in mind they could affect the pick up number and therefore not made the results fair.For this experiment I will use a clamp, a nail, an ammeter, a power pack, four wires and some paperclips. Firstly I will set up the apparatus (mentioned above) as shown in the diagram below. I will then increase the number of coils on the nail each time by five and see if this makes a difference as to how many paper clips the nail will pick up.
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In my experiment I will measure the number of paper clips picked up by the nail and the current (number of amps) the ammeter is on. To check and improve my results I will repeat my experiment.The biggest problem with using this method is that it is not particularly accurate and it can be very hard to attach the paper clips once you have reached a certain lengthTo keep this experiment safe I have to address the possible hazards and minimize them. The coil could heat and burn the plastic insulation so I will only use it for a couple of seconds before I turn it off. I will also use no stronger than 5 amps for the same reason. I will also make sure that there is no bare insulation or any water near any electrical equipment. This will help to prevent electrocution.I am only going to change the number of coils in my experiment. This will help to keep it a fair test. I will also have to keep the current the same throughout and use the same paper clips in each experiment. I will also always use the same iron core and try to keep the coil equally spaced out. My prediction is that when more coils are added, the strength of the magnet will increase therefore it will be able to attract more paper clips. I believe this will happen because as more coils are wrapped around the core, the magnetic field will get stronger and stronger. When we have seen a link between the number of paperclips picked up and the number of coils then we will know that we have enough results. ResultsNo. of coils No. of paper clips 1st Go nd Go Current (amps)15
1.00 4 1.5 4 4 1.40 5 5 1.45 6 6 1.4AnalysisMy results showed that the more coils around the electro magnet then the more paperclips the magnet can pick up. This proves that my prediction was correct. We also used another set of results ranging from 10 to 00 coils. Here is the results tableNumber of turns Current (A) No. Of clips held10 .0 00 .0 00 .0 150 .0 70 .0 8100 .0 110 .0 14150 .0 1700 .0 As well as my results table, my graph also shows the relationship between the number of coils and the number of paperclips picked up. You can see a curve in the graph, as from 0-10 coils the electromagnet is not able to pick up any paperclips.The first few points on the graph are low numbers; 0,0,1,. This means that the beginning of the graph is not that steep. However after the fourth point the gradients gets steeper as the number of paperclips picked up goes from up to 8, a difference of 5 paperclips. After this the gradient continues to increase until it reaches its highest known result of paper clips.In the results of the experiment I did there is what I considered to be an odd result. Instead of holding paperclips the magnet held 4 on the second attempt. This was at 0 coils. If we did the experiment for longer then the results would most likely stay the same, as the number of clips held depends on the number of coils, therefore if you continue to increase the number of coils then the number of paperclips will continue to increase. In between my points there are gaps where I will guess how many paper clips have been picked up. For instance at 40 coils, I would guess that the number of paperclips picked up was . This is because at 0 there was 1 paper clip and at 50 there were . I would also guess that at 60 coils the number of paperclips would be about or . At 110 coils I would guess that 1 paperclips would have been picked up. The graph showing my results and the graph showing the results above are quite similar. They both go up fairly steeply and at about the same rate. Lauren Oswell Please note that this sample paper on How can you change the strength of an Electromagnet? is for your review only. In order to eliminate any of the plagiarism issues, it is highly recommended that you do not use it for you own writing purposes. In case you experience difficulties with writing a well structured and accurately composed paper on How can you change the strength of an Electromagnet?, we are here to assist you. Your persuasive essay on How can you change the strength of an Electromagnet? will be written from scratch, so you do not have to worry about its originality.
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