# magnetism

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 at 2:22 AM, 2 replies, in forum: Advanced Physics Homework

### 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

### 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

### 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

### 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

### 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

### 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

### 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

### Magnetism: magnetic feild strength of a wire

1. The problem statement, all variables and given/known data A wire 1.0 mm in diameter carries 5.0 A distributed uniformly over its cross...
Thread by: physicsStudent00, Oct 22, 2017, 3 replies, in forum: Introductory Physics Homework

### B Temperature and magnetic flux density

Hello all; I am new in this forum, currently in High School. For some time now, I have been looking online for a relationship between...
Thread by: Tufon, Oct 17, 2017, 1 replies, in forum: General Physics

### I Electromagnetism in the Lithosphere and Ionosphere

Hi guys, Disclaimer: not a physicist (I wish I was that brainy) Quick question regarding a speculative architecture project I am undertaking;...
Thread by: Paul Brooke, Oct 16, 2017, 6 replies, in forum: Astronomy and Astrophysics

### I Examples of Positive Charges creating a magnetic field

As a SP phenomena I thought this may be the best sub to post this. We understand how current creates a magnetic field, and almost all forms of...
Thread by: Windadct, Oct 9, 2017, 5 replies, in forum: Special and General Relativity

### Four carbon brushes for a DC Motor- what are they for?

Hi in every theoretical explanation of any kind of DC motor there's always a split ring commutator and two brushes like in the following pic...
Thread by: Hondaboi1729, Oct 4, 2017, 12 replies, in forum: Electrical Engineering

### Can diamagnetism be created electrically

I was wondering if diamagnetism can be created electrically or does the material have to be diamagnetic in nature?
Thread by: Carl Sabel, Sep 26, 2017, 5 replies, in forum: General Physics

### 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