Magnetic poles Definition and 25 Threads

When I look at images of the pattern of iron filings around a magnet I cannot see any difference between the Pattern at the 'North' and 'South' poles. The present model also says that the field 'flows' from North to South but if this were the case it would not be necessary to move a magnet near...

I need to do question 1. I understand the right hand rules but am lost on what to do here.

Firstly, please note that I am talking about the period BEFORE electricity and magnetism were unified. So I am NOT seeking for answers based on Ampere atomic current model of magnets. I have read the following statement about the property of magnets at two different places. One from here: and...

Homework Statement Draw this diagram: Now do the following: find the unknown poles labelled with a question mark draw the magnetic field around the conductor shown determine the direction of the force acting on the conductor Homework Equations Using the right-hand rule can help to solve...

I am computing force between two magnetic poles each of one unit pole (in emu) and situated one centimeter apart. In electromagnetic units: ##F_{dyne}=\dfrac{p^2}{r_{cm}^2}=\dfrac{1^2}{1^2}=1 dyne## where ##p## is pole strength in emu In SI units: ##F_{N}=k_A \dfrac{P^2}{r_m^2}=10^{-7}...

Hi. Since there haven't been observed magnetic monopoles so far, what exactly do we mean when we talk about the north/south pole of a magnet? Is it something like "north is where the field lines exit a solid body" and "south is where they enter" or is there a more rigorous definition?

In reading my physics book, there was mention of different types of poles. I was hoping someone could explain the differences and possibly supply a visual representation of the poles with respect to each other as to where they lie on Earth. The different poles were the magnetic N/S, geographic...

Also, How do we know the radioactive decay is constant? I know that carbon dating cannot be 100% accurate because the rate of production fluctuates based on cosmic rays hitting our upper atmosphere. Why isn't this true with Earth metal isotopes? Is time truly constant? It seems like a lot...

hello everyone, though not a scientist or professional student I have a fondness for Earth sciences, geology, seismology, ecology with interests in pole-shift theory, space/time relativity, archeology, anthropology and genetics, specifically, genetic genealogy. Here just to see read about...

What is the reason for the analogy that a magnetic south pole can be considered negative and a magnetic north pole positive? I understand magnetic field lines run from North to South and electric field lines run from positive to negative. Is this the only basis? Or are the magnetic poles...

When watching some videos about neodymium magnets, I came upon a very interesting phenomenon. Namely, the maker of the video put a large magnet near an old CRT TV. At first, a big black spot appeared on the screen. This means that the electrons were repelled from from the magnet and didn't...

Bar magnet... why are the magnetic poles of a magnet are located somewhere within the magnet,not at the ends?

I was wondering what the difference in the magnetic poles north and south is and what makes them unique.

I am supposed to discuss the benefits of having high number of magnetic poles in ac generators with constant frequency. From formula it is obvious that the higher number of poles the lower the speed of rotation. But is there anything else, or what is the benefit of lower speed? The only...

Topic. If I have an iron shaped like a bar magnet placed flat on the floor, can the poles of the magnet be pointing anywhere else other than 90 degrees and 180 degrees?

Why do the magnetic poles line up (relatively speaking) with the poles of Earth's rotation?

Why don't magnets fly to Earth's magnetic poles? I understand that Earth's magnetic pull must be strong enough to pull a magnet to the pole, but what is the force required for a magnet to get pulled the over their? How does one calculate whether a magnetic field is strong enough in order for two...

Magnetic poles (A simple question but I don't know how to answer it?) (i)Show the magnetic field associated with the earth, (ii)and use your diagram to explain why magnetic poles always occur in north south pairs I don't know how to go about the second part at all!?/

Hi, I was wondering if anyone could tell me how to calculate the attractive force between a pair of magnets. I orignally thought that this would involve a really simple formula (something of the 1 over r squared variety) but have struggled to find any equations dealling with the force between...

My geology prof says that no one knows. I think I'll cry if that's true. It's driving me nuts.

There is supposed to be a switch of magnetic poles in several thousand years which already started 150/200 years ago. This gave me an idea. Can the changing magnetic orientation cause the whales (and other large mammals living in the sea who use the Earth's magnetic field) to "crash" on shores...

Will a sudden change in the orientation of Earth's magnetic poles have catastrophic consequences for migrating species?

I just watched a documentary on the history of the Earth's magnetic field that was very interesting. It said that the Earth historically has averaged a pole flip roughly every 200,000. However, Earth has not flipped its poles in over 700,000 as evidenced by ferromagnetic iron samples taken...

What determines a magnetic pole? Everyone has known sense elementry school that on a bar magnet (and the earth) have North and south magnetic poles... my question, what make a (bar magnet) that way? If I were to cut a bar magnet in half(between the poles) would I have one magnet that was...

Unnecessary "magnetic poles" ? If I run steady, same direction, currents through two close, slack parallel wires, I will see the two wires attract each other. If I reverse one of the currents I will see the two wires repel each other. If I now roll the wires up into coils, and place them on...