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    May 2016
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  1. Hi, I'm in IB1 & am doing my ee in physics. My rq is: How does the resistivity of the metal affect the levitating force produced? The theory behind this is that when a metal plate is suspended above a solenoid/electromagnet, eddy current is induced in it which produces a magnetic field that opposes that of the solenoid, hence create a repulsive force. Is this topic narrow enough? Or is it too narrow for a 4000-word essay?
  2. Thank you everyone for your suggestion! I decided to stick to HL until I feel really secure with my other HL subjects. Meanwhile I'll try to memorize the key facts of case studies and brush up on my essay writing skills. Once again, thank you! (:
  3. I see. Thank you very much! Also, do you have any idea on what to study about case studies?
  4. Hi, I am in IB1 this year, and am stuck in between dropping Geography to SL or not. Before I start, does anyone have an effective way of studying Geography? I've not done Geo before and so I am stuck without knowing what to memorise & study. My friends told me to memorise the case studies, but what about case studies? Is it like the location and statistics? I am currently doing 4 HLs (Chemistry, Physics, Math & Geography), and Geo is my back-up subject as from what I know, Math-Chem-Physics HL is a suicidal course. However, I've found that the other 3 HLs are much more manageable than Geography. I'm also predicted a 7 at the sciences and Math but a 6 in Geo. I'm also less interested in geo than the other 3 HLs.. Will dropping geo to SL give me a better chance to get a 7? Or should I stick with 4 HLs (so that I can drop one of the sciences/math), because I simply do not know the right technique of studying geo? I appreciate it very much if anyone is willing to share tips on studying geography Thank you.
  5. Hi, I posted this post in the wrong forum by accident. How can I delete a post on IB survival?
  6. By stabilization I mean that the system will not spontaneously flip into a configuration where the lift is neutralized.
  7. Hi, I have a few questions regarding magnetic levitation achieved by using alternating current to induce eddy current on a non-ferromagnetic conductor plate to provide the levitation force. 1. Can it be stabilized? If yes, in what ways? 2. Are there any equations/formulae or ways to calculate the levitation force provided by eddy current in this case? Which physics laws and equations should I apply in this case? (Except Faraday's and Lenz's law) 3. Is there a direct relationship between the frequency of alternating current and levitating force? I've looked up the Internet for the whole day but still could not find an answer, your help is appreciated. P.S. I am planning to do this for my ee, is this a good topic?
  8. I'm in IB1, and have to decide on my subject for EE soon. I wish to do theoretical physics/quantum mechanics in university, so I was thinking of doing my ee in that topic, but I read on several sites that a theoretical physics ee usually scores very low mark because there's no new idea in it. Therefore, I'm also considering doing an experimental physics ee on the topic electromagnetism. However, since experimental physics ee is not very related to quantum mechanics, I was also thinking of doing ee on Maths to research about the Maths involved in quantum mechanics/theoretical physics. Is it way too ambitious? As I also read that the topic should not be over complex since it's not a phd thesis. Also, I've read that a Maths ee is way more difficult than physics- to what extent is this true? My main interest is in physics.
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