Lab Report 12 Template SUP010

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Dec 6, 2023

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Laboratory 12 Magnetism Laboratory Report Purpose Write a fully developed paragraph that describes the purpose of the experiment. Discuss the following topics: 1) the main concept(s) being investigated, 2) the variables (quantities) being measured, and the instruments and techniques used to measure them, and 3) the type of analysis used to draw conclusions from the data. The purpose of the experiment was to observe the force of a magnetic field at various distances and to construct an electromagnet and study the variables affecting its strength. The variables we measured were the position and the flux density. We used a ruler to measure the position and LabQuest to measure the flux density. We would slowly lower the magnet until it reached a point at which the iron filling reacted. The type of analysis we used was logical analysis, if the data made sense with what we know to be true and have seen thus far, then we kept it, otherwise we rejected it and tested again. Data Tables Data Table 12.1 Magnet Position (cm) Flux density (T) Neodymium 2.8 5.0 Alnico 1.0 4.95 Samarium 1.57 4.99 Ceramic 2 -5.01 Data Table 12.2 Magnet Position (cm) Flux density (T) % diff. 1.5 V, half coils .3 2.51 13 1.5 V, full coils 0.7 4.38 3 V, half coils 1 3.08 21.4 3 V, full coils 1.1 4.97

Laboratory 12 Magnetism Laboratory Report Questions 1. Describe two significant differences between a permanent magnet and an electromagnet. Permanent magnets are harder to make but forever, electromagnets are easy to make but last a short time, permanent magnets have a set amount of strength whereas electromagnets can change their charge 2. Which magnet was the most powerful in this lab? Cite from your data to support your answer. The neodymium magnet was the strongest because it pulled the iron shavings from 2.8 centimeters away. It also had a magnetic flux of 5. 3. Which characteristic has a greater effect on the strength of a magnet: mass or the number of unpaired electrons? Support your answer from your data. From the data I have to say that the number of unpaired electrons has a greater effect. This is because the strongest magnet was the smallest. The neodymium magnet was way stronger than the ceramic despite being smaller and stronger than the alnico and samarium magnets too. 4. Supposing that they had equal strengths, describe an instance in which an electromagnet would be preferable to a permanent magnet. An instance that would be more preferable to have an electromagnet would be in the case where you are using the magnet to move things, such as metal scrap, the electromagnet can drop the items when turned off whereas the permanent magnet would just hold the items and become a hinderance rather than a help. 5. Record your major, and then describe a scientific use for electromagnets in a career related to your major. My major is computer science and electromagnets are used to wipe data from storage. This is often used in companies; they wipe sensitive data that is no longer needed monthly and sometimes weekly. Error Analysis Write a fully developed paragraph. Discuss at least three errors: what was the error, what caused the error, and how did the error affect the value of the data?

Laboratory 12 Magnetism Laboratory Report One source of error was the index card we used to prevent iron shavings from touching the magnet. This was required but on some of the magnets the index card created a bit of space because it stuck out. This affected the distance on the weaker magnets because they were already practically touching the iron filling. This would have resulted in a very different percent difference. The second source of error was the magnet being charged by another magnet. This would change the flux value temporarily and cause us to record a completely incorrect value. This would result in a completely incorrect percent difference. The final source of error was the ruler not being completely straight. If it was not completely straight then we would get a higher value for the position then we would want. This would result if a different percent difference. Conclusions Write a fully developed paragraph. Discuss whether the lab was a success or failure, providing support with an objective means of analyzing your data. I believe this lab was a success because we were able to observe the force of a magnetic field at various distances and to construct an electromagnet and study the variables affecting its strength. We also applied these concepts in a real-life application. The concepts were made clear, and I understand how magnets are affected by flux density a. The only thing I would change about this lab is possibly being able to add a bit of what we learned about how magnetic fields could generate electricity or electricity could generate motion. So, all in all this lab was a success.

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