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magnetism

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  1. appliedF
    Thread

    Magnetic field/induction

    1. The problem statement, all variables and given/known data A magnetic field perpendicular to the plane of a wire loop is uniform in space but...
    Thread by: appliedF, May 8, 2018, 8 replies, in forum: Introductory Physics Homework
  2. pager48
    Thread

    How do I find out the flux for an air core inductor

    How do I find out gauss from air core inductor 36mohm pumped with ~130amps 9ms long?...
    Thread by: pager48, May 6, 2018, 5 replies, in forum: Electrical Engineering
  3. Mariah
    Thread

    Why do I have to use integration and components?

    1. The problem statement, all variables and given/known data in the picture. 2. Relevant equations F=ILcrossB Along with the original question,...
    Thread by: Mariah, Apr 25, 2018, 3 replies, in forum: Introductory Physics Homework
  4. Clark Magnuson
    Thread

    How many Amp turns around the Earth for this flux density?

    Someone is asking me how much current in a loop of wire the diameter of the earth to make the same level of magnetism the earth has? I hope I am...
    Thread by: Clark Magnuson, Apr 21, 2018, 4 replies, in forum: Electrical Engineering
  5. fluidistic
    Thread

    I A question about antiferromagnetism in an external B field

    At first I was wondering whether antiferromagnetic materials exhibit magnetic hysteresis. From what I could read on wikipedia, I think they...
    Thread by: fluidistic, Apr 21, 2018, 3 replies, in forum: Atomic and Condensed Matter
  6. Nuno Miguel
    Thread

    I How to control the weight of an object?

    Hello everyone, First off, i would like to apologize for any spelling errors. I am Portuguese and my english is going to be very simple. I am in...
    Thread by: Nuno Miguel, Apr 19, 2018, 23 replies, in forum: General Physics
  7. RealJebKerman
    Thread

    Is a diamagnetic levitation engine possible?

    I recently saw the video of the frog being levitated with a big magnet. Would it be possible to flip the magnet over and use it to levitate a...
    Thread by: RealJebKerman, Apr 18, 2018, 11 replies, in forum: General Engineering
  8. APUGYael
    Thread

    I Magnetic Field Lines & Force

    Hello, I am unable to understand a certain (important) concept. We all know what the field lines of a permanent magnet look like. They go from...
    Thread by: APUGYael, Apr 17, 2018, 14 replies, in forum: General Physics
  9. Dustin
    Thread

    B 4 Questions About Lenz's Law Experiment

    Hello, I have four questions. As it stands now, I don't have the necessary materials to test this myself, which is how I'd prefer to learn the...
    Thread by: Dustin, Apr 15, 2018, 14 replies, in forum: General Physics
  10. cronnin
    Thread

    B Electrons, magnetism and spin

    Theory explains magnetism in iron as a combined effect of magnetic moments of electrons. Now, what is confusing me is that valence electrons in...
    Thread by: cronnin, Apr 14, 2018, 2 replies, in forum: General Physics
  11. Ron Burgundypants
    Thread

    Classical Book recommendation; magnetism/magnetic entropy related

    I'm looking for a book to help me understand a project I'm working on measuring the magnetocaloric effect. I'd like to understand a bit more about...
    Thread by: Ron Burgundypants, Apr 10, 2018, 2 replies, in forum: Science and Math Textbooks
  12. ktjj4
    Thread

    Direction of the Magnetic Field at a Point

    1. The problem statement, all variables and given/known data The problem asks to find the direction of the magnetic field at point P, which is at...
    Thread by: ktjj4, Apr 9, 2018, 10 replies, in forum: Introductory Physics Homework
  13. MaximumTurtles
    Thread

    Charge distributions of two infinite parallel plates

    1. The problem statement, all variables and given/known data Two infinitely large conducting plates with excess charge 2Q and 3Q are placed...
    Thread by: MaximumTurtles, Apr 3, 2018, 4 replies, in forum: Introductory Physics Homework
  14. Mariah
    Thread

    What equation for induced EMF?

    I understand the direction compnent of this question. But I don't understand where the magnitude of the induced current came from? I'm assuming...
    Thread by: Mariah, Mar 30, 2018, 1 replies, in forum: Introductory Physics Homework
  15. Michael Sofroniou
    Thread

    Braking Force from Eddy Currents on a Rotating Disk

    Hello! I'm currently working on a project that will utilize the phenomena of eddy currents to apply a braking force to a rotating disk. Some...
    Thread by: Michael Sofroniou, Mar 27, 2018, 1 replies, in forum: Electrical Engineering
  16. Mariah
    Thread

    I Why no induced current when these coils are stationary?

    These is there no induced current when the coils are stationary relative to each other? Isn't there still current (moving charges) in the the one...
    Thread by: Mariah, Mar 24, 2018, 2 replies, in forum: General Physics
  17. sergiokapone
    Thread

    I Magnet's force on a metal ball

    As one know, the force on mangnetic dipole in magnetic field is $$ \vec F = (\vec p_m\cdot \nabla) \vec B_0$$, where B_0 -- external field. Let...
    Thread by: sergiokapone, Mar 24, 2018, 1 replies, in forum: General Physics
  18. Vatsal Goyal
    Thread

    Doubt in electromagnetic induction

    1. The problem statement, all variables and given/known data suppose a coil is placed in a changing magnetic field and the circuit is not closed...
    Thread by: Vatsal Goyal, Feb 23, 2018, 4 replies, in forum: Introductory Physics Homework
  19. tzzzsh
    Thread

    Mechanics II: Feynman Paradox

    I am currently going through a friend's Mechanics II notes and homework before I take the course at a different university next semester. I have a...
    Thread by: tzzzsh, Feb 21, 2018, 2 replies, in forum: Advanced Physics Homework
  20. Irl495
    Thread

    Rotating magnetic field effect on aqueous mixing (opinions?)

    This is question that can't really get a precise answer without significant modeling or experimentation, but I'm wondering what folks' intuition...
    Thread by: Irl495, Feb 9, 2018, 4 replies, in forum: Materials and Chemical Engineering
  21. Rav430
    Thread

    I Current and magnetic fields

    Why does current produce a static magnetic field, but a static magnetic field doesn't produce current? Specifically, why is one true, but the...
    Thread by: Rav430, Feb 4, 2018, 2 replies, in forum: General Physics
  22. mitchy16
    Thread

    Magnetic Field due to Opposing Coils

    1. The problem statement, all variables and given/known data Describe the magnetic field you would observe if two coils were connected with...
    Thread by: mitchy16, Feb 3, 2018, 9 replies, in forum: Introductory Physics Homework
  23. mitchy16
    Thread

    Full Width Half Maximum of Single Coil

    1. The problem statement, all variables and given/known data Determine the Full Width Half Maximum (FWHM) using the single coil equation and...
    Thread by: mitchy16, Feb 3, 2018, 8 replies, in forum: Introductory Physics Homework
  24. AdenB14
    Thread

    I Satellites and the Earth's Magnetic Field

    So i was just wondering if a satellite's circuitry could be affected by the earths own magnetic field inducing a current, if it was moving through...
    Thread by: AdenB14, Jan 14, 2018, 7 replies, in forum: General Physics
  25. Blue Kangaroo
    Thread

    300 Level Classes

    I'm not if this is the right place for this, so mods can feel free to move this. I'm a part-time student going into my second semester of 300...
    Thread by: Blue Kangaroo, Dec 26, 2017, 5 replies, in forum: Academic Guidance
  26. FlyJanasic
    Thread

    B What's the relationship between drop height and induced emf?

    In my experiment, I intended to find out how the change in the bar magnet drop height from solenoid affected the emf induced in the solenoid,...
    Thread by: FlyJanasic, Nov 19, 2017, 4 replies, in forum: Beyond the Standard Model
  27. Gevorg
    Thread

    I Why do neutron stars have such powerful magnetic fields?

    The sources I've looked at claim the magnetic field is present because there are still some electrons in the neutron star. Here is how I...
    Thread by: Gevorg, Nov 13, 2017, 7 replies, in forum: General Physics
  28. Physistory
    Thread

    Time of Electron/Proton to Radiate Away Half of Their Energy

    1. The problem statement, all variables and given/known data It is shown in more advanced courses that charged particles in circular orbits...
    Thread by: Physistory, Nov 13, 2017, 2 replies, in forum: Introductory Physics Homework
  29. jartsa
    Thread

    B Against length contraction explanation of magnetism

    When a test charge stands next to a wire, there are coulomb forces between the test charge and the protons of the wire. 1: When the test charge...
    Thread by: jartsa, Nov 8, 2017, 24 replies, in forum: Special and General Relativity
  30. Thynazgul
    Thread

    I Why does the solar wind follow magnetic field lines?

    My physics teacher said that the northern lights are the product of charged particles coming from the sun and interactign with our atmosphere. I...
    Thread by: Thynazgul, Nov 1, 2017, 1 replies, in forum: Classical Physics
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