# magnetism

### 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

### 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

### 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

### 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

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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### 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