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magnetism

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  1. Misiak
    Thread

    A How can i measure high magnetic fields?

    Hello! I've made a lot of research about measurement of high magnetic fields - such us 1T - 2T and I can't find sensors for this range. I'm...
    Thread by: Misiak, Sep 11, 2017, 6 replies, in forum: General Physics
  2. Tahmeed
    Thread

    B Magnetism of gravity

    Using special relativistic calculation it can be showed that magnetism is a result of electric charges in motion. using the same argument, why...
    Thread by: Tahmeed, Sep 6, 2017, 20 replies, in forum: General Physics
  3. Jarfi
    Thread

    I Particle defined "at rest" compared to a magnetic field?

    I am trying to understanding magnetism and I've been running into this thought problem A particle a in a magnetic field B responds with Force...
    Thread by: Jarfi, Aug 27, 2017, 7 replies, in forum: General Physics
  4. Brendan Graham
    Thread

    I Induction via Infinite sheet of Current

    My thoughts are concerning an infinite sheet carrying current in a direction. I wish to induce a unidirectional electric field outside of the...
    Thread by: Brendan Graham, Aug 27, 2017, 1 replies, in forum: Classical Physics
  5. crick
    Thread

    I Waveguide: get I and II M.eq. from III and IV M.eq.

    Consider a waveguide with axis parallel to axis ##z##. Using cartesian coordinates the fields inside the waveguide can be written as [ATTACH]...
    Thread by: crick, Aug 17, 2017, 3 replies, in forum: Classical Physics
  6. peroAlex
    Thread

    B-Field on Axis of Equilateral Triangle

    1. The problem statement, all variables and given/known data I came across a pretty interesting question that asks for magnetic flux density...
    Thread by: peroAlex, Aug 15, 2017, 1 replies, in forum: Engineering and Computer Science Homework
  7. JoeSalerno
    Thread

    Diamagnetism experiment with copper/lead

    I'm new to the concept of diamagnetism, but it seems very fascinating, and I'd like to try a simple experiment. Say I wanted to repel a small...
    Thread by: JoeSalerno, Aug 8, 2017, 6 replies, in forum: General Engineering
  8. abilolado
    Thread

    I Force on Steel Bar Inside Solenoid

    Hello all. Me and some friends are building a coil cannon, and we've been doing some calculations [I know its unecessary but... well, we're...
    Thread by: abilolado, Aug 6, 2017, 5 replies, in forum: Classical Physics
  9. peroAlex
    Thread

    Induced Voltage of Rotating Circular Loop

    HI! I'm a student, this question appeared in one of the old tests. I though I had it solved but apparently I must have missed somewhere. Could...
    Thread by: peroAlex, Jul 27, 2017, 8 replies, in forum: Engineering and Computer Science Homework
  10. kbraith3
    Thread

    Can anyone help with this magnetism problem?

    A 2.53*10^(-6) C charged particle with kinetic energy of 0.0929 J is fired into a uniform magnetic field of magnitude 0.147 T. If the particle...
    Thread by: kbraith3, Jul 21, 2017, 8 replies, in forum: Introductory Physics Homework
  11. Chris Nimmons
    Thread

    B Aim the solar furnace up! :)

    If one was to create an array of X amount of mirrors tracking the sun and shining on a targeted spot in the sky to create ions at specific...
    Thread by: Chris Nimmons, Jul 9, 2017, 11 replies, in forum: General Physics
  12. anonyaway
    Thread

    Rotating disc in a rotating magnetic field

    1. The problem statement, all variables and given/known data :A metallic disc of radius R is placed perpendicular to a magnetic field B.Both the...
    Thread by: anonyaway, Jun 26, 2017, 8 replies, in forum: Introductory Physics Homework
  13. gau55
    Thread

    I Current flow on the surface of a permeability bigger than 1

    Hi, Quick description of the problem at hand: spherical perfect conductor around the origin with radius a, spherical shell (with radius b) around...
    Thread by: gau55, Jun 24, 2017, 1 replies, in forum: Classical Physics
  14. awcrowe
    Thread

    I What is a magnetic field "made" of?

    I have looked this up on several occassions and never satisfied. It seems that either the answer keeps repeating magnetic or electromagnetic field...
    Thread by: awcrowe, Jun 22, 2017, 11 replies, in forum: General Physics
  15. Astronaut
    Thread

    Magnetic Forces on objects in nonuniform fields

    I have this question which I need to solve . But I am unable to. Suppose I have a current ring of radius R and current I (constant). at a...
    Thread by: Astronaut, Jun 22, 2017, 3 replies, in forum: Introductory Physics Homework
  16. Evagoras
    Thread

    B About magnetic field attraction

    We know a magnet has field with direction from North to South. Why when a piece of iron come close to the magnet can either be attracted and from...
    Thread by: Evagoras, Jun 13, 2017, 2 replies, in forum: General Physics
  17. gammzy98
    Thread

    I How to use magnets to float an object (Diagram)

    Hey everyone, I have been doing some research in regards to floating an object, and possibly have it rotate. I am thinking magnetism is the way to...
    Thread by: gammzy98, May 31, 2017, 5 replies, in forum: General Physics
  18. CCatalyst
    Thread

    Need help doing force calculations with magnetism (between magnets)

    I am trying to calculate the forces (in Newtons) between a permanent magnet, and an electromagnet. All I can find is interactions between...
    Thread by: CCatalyst, May 28, 2017, 31 replies, in forum: Electrical Engineering
  19. Xynon
    Thread

    I Relativity paradox with charged spheres

    There is a similar thought experiment I imagined to help me begin to understand the Bell's spaceship paradox: Consider two positively charged...
    Thread by: Xynon, May 21, 2017, 6 replies, in forum: Special and General Relativity
  20. Toby_phys
    Thread

    Lorentz force - particle in an odd magnetic field

    1. The problem statement, all variables and given/known data Particles of mass ##m## and charge ##q## are initially travelling in a beam along the...
    Thread by: Toby_phys, May 5, 2017, 1 replies, in forum: Introductory Physics Homework
  21. Crosshash
    Thread

    A How do Magnetic Gradiometers work?

    Whenever I've encountered measuring magnetic fields with magnetometers, they've typically been very large magnetic fields (up to a few T)....
    Thread by: Crosshash, Apr 21, 2017, 3 replies, in forum: Atomic & Condensed Matter
  22. alexdr5398
    Thread

    Finding the direction of current given a varying magnetic...

    1. The problem statement, all variables and given/known data [ATTACH] 2. Relevant equations μ0 In,e = ∫B⋅ds 3. The attempt at a solution I...
    Thread by: alexdr5398, Apr 18, 2017, 2 replies, in forum: Introductory Physics Homework
  23. sunnnystrong
    Thread

    What is the magnitude of the electric field (rod)?

    1. The problem statement, all variables and given/known data Two thin glass rods are placed side by side 4.70 cm apart as shown in the diagram...
    Thread by: sunnnystrong, Apr 16, 2017, 4 replies, in forum: Introductory Physics Homework
  24. alexdr5398
    Thread

    Why is this loop pushed downwards by the magnetic field?

    1. The problem statement, all variables and given/known data [ATTACH] 2. Relevant equations FB = ∫I ds×B 3. The attempt at a solution My first...
    Thread by: alexdr5398, Apr 14, 2017, 2 replies, in forum: Introductory Physics Homework
  25. davidt92
    Thread

    B Interaction between a neutral atom and an external magnetic field

    Lets suppose that I have a magnetic dipole moment at (0,0,0) pointing to the Z axis, and in the position (X,Y,Z) in the space, I have a Hydrogen...
    Thread by: davidt92, Apr 3, 2017, 3 replies, in forum: General Physics
  26. cheapstrike
    Thread

    Tension in a flexible circular loop

    1. The problem statement, all variables and given/known data A small circular flexible loop of wire of radius R carries a current I. It is placed...
    Thread by: cheapstrike, Mar 31, 2017, 29 replies, in forum: Introductory Physics Homework
  27. peasqueeze
    Thread

    I Modified Cycloid motion of charged particle

    I need a charged particle trajectory in crossed E and B that is a cycloid in the x-y plane. This part is simple enough, but I want the trajectory...
    Thread by: peasqueeze, Mar 29, 2017, 1 replies, in forum: Classical Physics
  28. Stendhal
    Thread

    Find the magnetic field at the point

    1. The problem statement, all variables and given/known data A long, straight wire lies along the z−axis and carries a 4.20 −A current in the...
    Thread by: Stendhal, Mar 27, 2017, 3 replies, in forum: Introductory Physics Homework
  29. particlezoo
    Thread

    I The Electric field of a moving charge according to Purcell

    In Berkeley Physics Course (Volume II) on Electricity and Magnetism:...
    Thread by: particlezoo, Mar 26, 2017, 46 replies, in forum: Special and General Relativity
  30. patodwyer
    Thread

    How do I design a Permanent Magnet Synchronous Generator?

    Hi, I'm trying to do a very simple analysis on Simulink where I am applying a speed to a Permanent Magnet Synchronous Generator with a purely...
    Thread by: patodwyer, Mar 19, 2017, 1 replies, in forum: Electrical Engineering
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