Magnetism Definition and 974 Threads

This is kind of like the chicken or the egg problem. I want to know if there is an established scientific opinion regarding this question.

Lithium-6 ions (mass is 6x a proton mass) are charged Li+ ions (one extra proton). They are accelerated by 2000 volts and passed through a velocity selector with a magnetic field of 0.020T into the page. The ions follow a straight path through the selector and are then deflected onto a piece of...

how do i find the b field of two perpendicular wires. suppose one wire is pointing out of the page and the other one is going from left to right. I am looking for the magnetic field between them. o (wire going out of paper) B=? xxxxxxxx (wire going left to right)

hey I am looking for a little help with some physics questions. if you can help me please either respond with the answers or e mail me at ... <email-deleted>. 1. a curcular current loop made of flexible wire is located in a magnetic field B; you may keep B constant or vary it. Describe three...

Line Integral and Magnetism Help! Here is a problem given to me as a takehome quiz I am having trouble even starting being that I missed that day we went over line integrals. Any hints or tips are much appreciated. http://ez-files.net/download.php?file=4ec07c5df1e8223123523fb11f038d39"

Problem: A fixed loop with Radius a and Resistance R is parrallel with the y-z plane. Another loop with radius r parallel to the y-z plane and a distance away from the other loop has a velocity v moving toward the other loop. What is the induced Voltage? Assuming (Told to assume this)...

this is not a school project its trying to find some answer or paper on: if magnetism can or can not bend space. the closest theory that I've found is: Theodor Kaluza (1885-1954) attracted the attention of the physical community since 1921 with his unified field theory of gravitation and...

Ok I'm not sure this is in the right forum, and this is a very broad question; I'm just starting to understand magnetism and its relation to the universe. This is basically a bunch of conjecture on my part, could you tell me if I am anywhere near the mark? The way I imagine it is this: There...

A copper bar has a constant velocity in the plane of the paper and perpendicular to a magnetic field pointed into the plane of the paper. If the top of the bar becomes positive relative to the bottom of the bar, what is the direction of the velocity ~v of the bar? 1. from right to left 2...

I am going through Olivier Kahn's book "Molecular Magnetism". I am stuck on something that seems so simple. On page 10, it is stated that \chi=C\sum_{M_S=-S}^{+S}\frac{{M_S}^2}{2S+1} The book then states that this leads to \chi=\frac{C}{3}S(S+1) I've tried to figure the steps between...

I've already taken the test but this is lingering in my head. We have two electrons in an area of 0 magnetic field. One electron is at rest while the other is moving westward. We then apply a magnetic field B moving eastward. What direction are the electrons moving? Note: No direction...

A couple of questions. 1. A capacitor of capacitance C is discharging through a resistor of resistance R. When will the energy stored be equal to half its initial value? My logic went like this: Energy in a capacitor (U) = Q^2/2C so: Q = (2CU)^0.5 so therefore the charge when the...

A solenoid 2.9 cm in diameter and 15 cm in length has 300 turns and carries a current of 5 A. Calculate the magnetic flux through the circular cross-sectional area of the solenoid. -->> I tried using the equation B = u(0)NI/L to calculate magnetic field, and then putting this in the formula...

What force is stronger, Gravity or Magnetism? I know that magnetism in general is stronger here on Earth but what about by the event horizon of a super massive black hole?

Physics 122 Course by Frank L. Wolfs (homepage - http://teacher.nsrl.rochester.edu/) Department of Physics and Astronomy University of Rochester http://teacher.nsrl.rochester.edu/phy122/Phy122HomePage.html#info Course notes [see post #4 for revised link]

simple question: how does an electron's spin create magnetism?

I am sorry to be bothering you - I am a high school student and I need help with something I don't understand. It is understandable if we think of why magnetic fields form closed loops if we think of the North and the South Poles not being separate from each other. This has been given as a proof...

Hey everyone, wondering if anyone knows if it's possible to remove the magnetism from a magnet through use of electicity. Specifically using 12volts, 2.5 amps DC. I'm looking for some kind of switch, or converter etc, that would remove the magnetism, but obviously I don't know exactly what...

An electron of mass 9.11 x 10-31 (9.11e-31) kg travels in a circular orbit within a large evacuated chamber. The orbit has a 2.0 mm radius and is perpendicular to a B-field of 0.030 T. What's the electron's speed? For this problem, the only equation i can think to apply is F=qvB. I know...

I've been demonstrated that magnetism is a consequence of special relativity, with a given single example. I'm more and more insterested with the subject and eager to read any text on the topic --I'm tired of empirical magnetism! If you know any freely available resource/paper on the subject...

The return stroke of a bolt of lightning typically carries a peak current of 24 kA up from the ground. What is the maximum magnetic field associated with the bolt 1.4 m away?l; I'm just having trouble finding the right formula for this problem is the correct formula B= (4pi x 10^-7* I)/2pi...

http://img63.imageshack.us/img63/2876/q16vq.jpg http://img334.imageshack.us/img334/6094/q29ae.jpg http://img334.imageshack.us/img334/7461/q39az.jpg I tried many methods but i keep getting a different final answer can anyone help? Please!

The potential is constant throughout a given region of space. Which of the following statements is true? Be sure you can justify your answer. 1. The electric field is zero in this region. 2. The electric field may have places where it is zero, and places where it is...

The coil wrapped around a magnet is attached to a battery (one end of the coiled attached the positive end of the battery and same goes to the negative side). I am confused with the right hand rule. Your thumb is to point to North, but North is what? The positive side of the battery? As you know...

Hi! Can anyone please tell me where this equation was derived from? This equation is used to get the magnetic field (B). I is current and r is the distance. And I think I understand the Meu. And yet I have no idea where the 2pi came from. I looked in my textbook, internet and asked friends...

Suppose an electron orbits a proton at a distance of 'r' with speed 'v'. How could i determine the magnitude of the magnetic field at the location of the proton? I thought it would make sense to use The Biot-Savart Law, but i don't know where to begin: dB = \frac{\mu_o}{4\pi} \frac{I ds x...

Suppose I use the direction of my hand to be velocity, the curling of my fingers to be the magnetic field, and my thumb to be the magnetic force. 1.) Then, if a positive object is moving North, and the magnetic field is NE, where is the resultant force? 2.) How about the Earth's magnetic...

I am trying to answer all the odd problems at the end of the chapter and I can't seem to get one of them. A long, current-carrying wire is oriented vertically; next to it is drawn a square whoe area lies in the same plane as the wire. Using the distances indicated, find the magnetic flux...

So these Earth's magnetism is supposedly produced inside these generator-like chambers inside of which various chemicals are mixing to form some sort of giant electromagnet, in theory, right? But whether this is or isn't true, where does magnetism come from at its root? Do photons have...

I place a magnet near a piece of iron. The iron bit accelerates across the floor towards the magnet. The magnet has done work. Energy has been expended. Where did this energy come from? This energy seems inexhaustible. Why isn't it used up?

GR explains how gravity works. Is there a similar explanation for magnetism. Maxwell showed that magnetism and electricity are two sides of the same coin. And I understand that electricity is a flow of electrons. Can that help me understand magnetism?

Do strong magnetic fields have any negative effects on the human body? Also, where can I find information regarding this subject?

Electricity and Magnetism urgent!pls! An infinite long line of charge of constant charge density a is located near the line AB which carries uniform charges with charge density b. Suppose both two lines are in the same plane, calculate the electrostatic force exerted on the line AB. i don't...

Electricity and Magnetism urgent!help! 11. Electric charge is distributed uniformly along each side of a square. Each side of the square has length a. Two adjacent sides have positive charge with total charge +Q on each. (i) If the other two sides have negative charge with total charge –Q on...

why adding copper to nickel result in reduced magnetism of nickel? :confused:

(law of conservation of energy!) apply to electricity & magnetism... ok guys... first look at the PICTURE. (now imagine) suppose i put SUCH CYLINDRICAL magnet in zero-gravity, perfect vaccum. Then say, i rotate the cylindrical magnet about its axis. a). what should happen? ->well, there...

silicon atom has 14 electrons with 2 unpaired electrons in 3p orbital. why silicon is not magnetic? :confused:

hi i have a few general questions on the right hand rule, 1. if a charged particle enters a magnetic field going from bottom left to top right at an angle of 45 degrees, and the direction of the current is vertically up how do we determine the force using the right hand rule? 2. a wire which...

Maybe this is more of a chemisty question but I have found that stainless steel is not magnetic. I can only reason that this would be if the Fe (iron) inside the steel is actually bonded with the other components of steel thus making the 3d spins useless to become aligned. i did a search and...

"scientists can produce magnets as strong as 40,000 Gauss" now when Ill come to calculate the force between two of these magnets, I will have to know their "strength". according to the 40K Gauss, what will be this strength? In other words, what does 40,000Gauss tell me about its strength...

I am wondering if a magnetic force will deviate different mass amounts of the same material through the same path as each other just like gravity does to different mass amounts of any material? Does anyone know? Has this been tested?

1) A horizontal metal rod of 1.5m long is aligned in and East-West direction and dropped from rest from the top of a high building. Calculate the e.m.f. induced across the falling rod 2.5s after release. The horizontal component of Earths magnetic field is 2x10^5 T. Surely you need the area...

I read on some physics website somewhere (I forgot which one) that a magnetic field around a bar magnet exists because there is a tiny probability that some electrons exist outside the bar magnet and when they do they emit virtual photons that can interact with other things to create the...

We are students in a scientific research project studying the physics of magnetism. We have made some strides but are looking to start a good brainstorming session into the physics of magnetism. All is welcome to join at http://projecthome2010.proboards2.com/index.cgi?board=general

As a diver, I'm constantly struggling with accurate compass readings. How much ferrous material at what distance would affect a compass? For example, would fifty pounds of steel two feet away affect the needle? If the needle of a compass is magnetic, will the needles on two compii affect...

Hi there, I have just set up / taken measurements from an "Einstein de Haas" experiment I set up, but there were a couple of weird effects I cannot explain nor figure out. FWIW, I am competing in the "International Young Physicists' Tournament" in Switzerland this July - should be a great...

Ok i was wondering something. If you send some light through a polarizer... how does the magnetism get through? I know you never find E without its M... but if you can block light with a polarizer (the light coming at a different angle), why would the magnetic part come out with the light that...

My teacher recently gave me a task of relating magnetic forces to a beam of chraged particles moving in a straight line. To aid us in this, she also set up a guideline question, displayed below: The diagram below shows a beam of charged particles moving in a straight line with speed v. Each...

A proton moves in a circular path perpendicular to a 1.15-T magnetic field. The radius of its path is 8.40 mm. Calculate the energy of the proton in eV. So, I calculated the velocity with: qvB = \frac{mv^2}{r} (1.60 \times 10^-19)(1.15) = \frac{(6.27 \times 10^-27)v}{0.0084} v = 2.47...

I'm confused if I am using the right equations to solve this problem. P: A singly charged Li^7 ion has a mass of 1.16x10^-26kg. It is accelerated through a potential difference of 500 Volts and then enters a magnetic field of 0.4 Teslas, moving perpendicular to the field. What is the radius...