Magnetism Definition and 974 Threads

Why are electrons generally further out than protons in the Van Allen Belt?

How are solar flares and solar winds generated due to the magnetic field of the sun ? Please elaborate and provide detailed explanation if possible.

If an electric charge is moving with constant velocity,what does it create?? A constant magnetic field or 1 which is varying with time?? What if it accelerate?

Homework Statement A charge moving with constant velocity, does it create a constant magnetic field or varying 1?? Homework EquationsThe Attempt at a Solution

Homework Statement Now, ignore the lengths given in the photo. Height (y) = .640 meters Length (z) = 1.18 meters Base (x) = .320 meters Magnetic Field (B) = 3.5 Teslas in the +X direction Homework Equations The problem is to find the magnetic flux through the surface of the...

I'm currently in an introductory electricity and magnetism course, and I've been pondering magnetic monopoles. We didn't go in depth with them at all, but the professor made a comment when discussing Gauss's Law for Magnetism, ##\oint \vec B \cdot d \vec A=0## (can't figure out how to type a...

a stationary magnet attracts another magnet or a piece of ferromagnetic material. 1) I am trying to quantify (generic formulae) the distance (from the magnet) at which the attracted material starts moving towards the magnet - 2) If I were to try interrupting the attraction at some point after...

Greetings, I majored in physics for 1 year at RPI (Troy NY) in 1974, but found more important things to do for many years thereafter, and have recently returned to college, first at ITT-Tech(Computer Electronic Technology) and then Sage College of Albany (Computer Information...

Homework Statement Hello. I just need someone to check if I'm approaching the problem correctly (the steps I've taken are given below). I drew a quick sketch of the circuit here: http://i.imgur.com/mClttXn.png?1 In the problem, I am given the capacitances of A, B, and C. I am also given the...

Hello everyone. For this semester's laboratory, we are required to work on a project on the topic of E&M (preferably). They've given us freedom of choice as to what we want to work on and I was wondering if any of you guys know some interesting and cool topic we (me and my partner) can study...

Do charges exist as a point or a distribution? Or does it depend on the situation? Or does the concept of image mean that it's very difficult to tell, and if so why is the point charge model being pushed so hard, what phenomena does it explain that distributions cant?

Hi Everyone, I need to write an essay for my electromagnetism class and i was wondering if anyone has good topic ideas. My criteria is that it needs to be 10 pages and I would like something that is interesting for me to research and write about. I was thinking so far of magnetic levitation...

https://www.kickstarter.com/projects/142464853/hendo-hoverboards-worlds-first-real-hoverboard I see that it says it's based on Lenz's law, which says that the induced currents will generate a field that opposes the change in the field. So, I figure they have some kind of oscillating magnetic...

Given the increase in geophysical phenomena (such as earthquakes and volcanic eruptions), it is obvious "something" IS going on with our planet. I have no trouble believing in this theory that a reversal of the Earth's magnetic field may be included -- sooner as opposed to later. However, no...

I'm a new TA in a physics laboratory and we're going to redesign experiences for fundamental physics II lab that is a semester course on electricity and magnetism for undergraduates in their 2nd year. What is your proposed list of experiences for a Physics II (Electricity and Magnetism)...

Hello, I have an idea i have been working on for some time. I am a meteorologist and pilot, and i love aviation, especially design. I have been playing with the idea of magnetic lift (as in when one magnet is repelled from another magnet) or electromagnetism in an engine, to create a different...

Hello everyone. I am searching for a book full of practice problems in Electricity and Magnetism and was hoping someone could recommend some. I have been searching on my own, but could not find any. I have a classmate who has one from china, where it is pure questions relating to the subject and...

The notion of multiplying the current in each loop in a toroid or solenoid with the total number of loops in order to find out the net current in the toroid or solenoid is appearing a bit confusing. Why do we do this when we know the same current is flowing through each loop (just like water...

Hey guys, I've recently learned that magnetism is an electric field viewed from a different frame of reference and that the mathematics of electrodynamics describes this. However something raised my eyebrow which I wasn't quite clear on. If energy is put into a net flow of electrons, the...

So I understand the divergence theorem for the most part. This is the proof that I'm working with http://www.math.ncku.edu.tw/~rchen/Advanced%20Calculus/divergence%20theorem.pdf For right now I'm just looking at the rectangular model. My understanding is that should we find a proof for this...

Found one article saying it is possible to reverse poles of permenant magnet using coiled wire wrapped around magnet, but nothing about the possibility of temporarily reversing or even temporarily weakening the magnetic field.. if there are any magnetism connoisseurs out there..

Is the magnetic field created by a magnet equally powerful across the entire surface area of the pole?

Is it possible to make a magnet that slides down a pole with no friction? The magnet would be a cylinder, the exterior would be N and the interior S. It would slide down the S end of a magnetized pole. That way the the pole would push equally on the sides of the interior of the cylinder. This is...

The circular loop carrying current experience a tension in external magnetic field.how can this tension be calculated and why doesn't it make a circular motion.

i ran a simulation that calculates the trajectory of a particle in the presence of a magnetic field from maxwells equations. it also calculates the work (line integral of force) and the kinetic energy gained(kinetic energy at the end of simulation minus kinetic energy at the beginning) i was...

As many people know, you can use electrical energy to create magnetism (electromagnets) and you can use permanent magnets to create electrical energy through induction (generators, the rotor inducing the stator). So what is the relationship here? Magnetism is not a form of energy or an energy...

So I want to get this whole spin/angular magnetism Bohr magneton quantum thing straight. Suppose a diamagnetic sphere lies at the origin. Let's talk in the x-y space for simplicity. Let's bring a bar magnet in along the x-axis approaching zero from the right. If the north pole of a bar magnet...

Homework Statement the problem is as: a very long straight solenoid has a cross section R and n turns per unit length . A direct current I flows through the solenoid . Suppose that x is the distance from the end of the solenoid , measured along its axis: (a) the magnetic induction B on the...

Homework Statement Two particles A and B having equal charges +6C, after being accelerated through the same potential difference enter a region of uniform magnetic field and describe circular path of radii 2 and 3cm repectively. The ratio of mass of A and B is ______ Homework Equations Force...

I always thought that magnetism was the exact same thing as electricity because of SR. That's probably why I am confused about the search for a magnetic monopole, as well as the classical view of light being perpendicular magnetic and electric fields. So I have a few questions. 1. What is the...

The question is slightly deceiving however still simple for those academics therefore, here I present my question: If I take a para-magnetic material and put it very close to a homogeneous magnetic field, the para magnetic material will start to accelerate towards the magnetic body thus it...

I'm totally confused. Everywhere I look, most explanations of how magnetism works doesn't include anything about the virtual photon interaction or whatnot. I'm just interested in the most basic explanation of how magnetism works, and I read in a graphic physics "textbook" ish thing that they...

1. Here is the prompt: http://imgur.com/mfbPidG 2. F = qv x B 3. At first this seemed like a simple cross product problem, and it probably still is, but I'm really confused as to what "3.70E6 m/s/ in the (i+j+k)/sqrt(3) direction" means, so I don't know how to set up my problem anymore. Could...

Certain objects are able to influence the behavior of magnets when super-cooled. Does this violate Maxwells equations?

When a substance is neither attracted nor repeled by a magnet what can I call such phenomenon? Thank you

Recently I've been interested in delving in deeper on the applications of magnetic wires. From this video, I was curious as to whether these wires (more specifically their enamel coating) were permanent magnets? Electricity and Magnetism Simple Electric Motor and if I use that...

Homework Statement A charged particle moves in a straight line through a particular region of space. Could there be a nonzero magnetic field in this region? In either case, include a sketch as well as prose in your justification. Homework Equations The Attempt at a Solution The...

Hey I'm new here so I don't know if this is the right forum, but from what I could see this was the most relevant. Homework Statement A long solenoid with 50 turns per cm carries a current of 0.2 A. The solenoid is filled with an iron alloy. The magnetic field B inside the iron alloy...

So I took honors level introductory physics courses my first year. Here are the descriptions. I did worse in the second course than the first. This coming year I will be taking intermediate level courses for these topics. The difference is that I will have both Intermediate Mechanics I and...

Hi! I am trying to understand how magnetic fields actually are electric fields viewed in a different frame of reference. I understand the basics of it, however I am confused by how the magnetic field is rotational around a wire when current moves through it and why the force isn't "outwards" at...

I hope that the title is a bit better than my last one... I would appreciate any input on items I have made or will be demonstrating as it should be about 30 minutes long and a balanced programme. Background... I am in training as an Assistant Beaver Leader in my Sons Beaver cubs scout pack...

I need some help figuring #2 problem out. Homework Statement 1. two charges of 6 microcoulombs and 10 microcoulombs are 10cm apart. Calculate their force of repulsion. Calculate the electric field midway between them. 2. For the charges in question 1 calculate the potential midway between...

Hello. I have a set of ODE where 1) \frac{dv_x}{dt}=\frac{q(t)B}{m}v_y 2) \frac{dv_y}{dt}=\frac{q(t)B}{m}v_x 3) \frac{dv_z}{dt}=0 Following the strategy to solve a simple harmonic oscillator, I differentiate (1) to get 4) \frac{d^2v_x}{dt^2}=\frac{q(t)B}{m}\frac{dv_y}{dt}+q'(t)v_y...

Homework Statement Problem: A Solenoid has N turns of Copper wire (Cross-section area of the wire is 10-6 m2) The Length of the solenoid is 25*10-2 m and its Resistance is 0.5 Ω. What's the Self-Inductance of the solenoid? Homework Equations Given answer: 5.5*10-5 H Please help me with...

how can magnetism be derived from electricity at the sub atomic level?? how is the magnetic field generated around an electron? if magnetism is just generated due to angular momentum of the electron it is said that if calculated the spin of electron would exceed light speed ; so will it work...

Two parallel wires carrying currents can repel each other, if the currents flow in the opposite direction. What would happen to a magnet or magnetic compass, if brought to close to the magnetic field of the first current, and then the second current? What direction would it point to/or which...

If you apply a field to iron the various domains move around, are the individual atoms of the FCC or BCC iron aligning with the field or does the unit cube tend to have an overall orientation which moves? If so then how would you know how the unit cubes are aligned relative to their poles...

Homework Statement Hi there. I've experienced another confusion.. This time regarding the signs used in the electromagnetical fields, the cross and the ''circle with a dot in it''. Homework Equations The issue here is, that my teacher always told us that for example X means that the vector...

magnetism and electrcity! according to me as i think that when an electric field is created by creating a potential difference ,the force from the electric field changes the direction of spin maybe due to which the opposite effects takes place from magnetic field because magneticdipole becomes...

I know that magnetism can be explained as the relativistic interaction between say a current, and a moving charge. My question however is twofold, is magnetism nothing but electric forces when relativity is taken into account? If the answer is yes, does that make magnetism a sort of psuedo-force?