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All magnetisim is due to moving charges. The best way to think of why all magnets have two poles is to think of a coil of wire with a current in it. This will create a magnet very much like a bar magnet. In the coil, one end is the North pole and the other end is the South pole. Now you can see that the coil must have two poles because it must have two ends. Cut the coil in half and it still has two ends. Cut the coil down to one loop and it still has two ends. Even in a bar magnet the magnetism is due to the orbiting electrons in the material. One side of the orbit is one pole and the other side is the other pole and there is no way to have an orbit without two sides. Now if magnetisim had magnetic charges ,like electricity does, then you could have magnetic monopoles but no one has ever found a magnetic charge.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoThat is not known for sure. Perhaps there are no magnetic monopoles. According to some theories, some magnetic monopoles may have been created during the Big Bang. If this is the case, perhaps they exist in such small quantities that they will not likely be detected.
Wiki User
∙ 16y agoNothing in physics really says that there can not be a magnetic monopole. However one has never been observed experimentally.
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What is an ampere-turn?
An ampere-turn is the unit of magnetomotive force, the work required to carry a magnetic monopole of unit strength once around a magnetic circuit.
Do bar magnets have a north and South pole?
Yes. All magnets of north and south poles. There is no such thing as a magnetic monopole.
Do particles that carry a magnetic charge exist?
This is one of the unsolved problems in physics. Some physicists believe that magnetic monopoles (i.e., magnetic charges) should exist, but none have been found yet.
The most appropriate value of the radiation resistance of a quarter wave monopole antenna?
The radiation resistance of a quarter wave monopole over a ground plane is 36.5 ohms.
What is potential difference of a monopole?
The simple answer: the potential at a point some distance, r from a monopole is kQ / r, where k is Coulumb's constant: 9.0E9 Q is the charge of the monopole and r is the distance from the monopole. And how to get there: Since electric force is kq1q2/ r2, the electric field ( Force per charge) is kQ/r2. The voltage of a particle is defined to be the integral of the electric field with respects to r. Thus integrating you get the above equation.
Does magnetic monopole exist?
This is an area of active research. Some serious theories say they might exist, but so far, none have been found.but if they exist,we will find it in BIG BANG
Can you have a magnet with only one end?
Probably not. The magnetic monopole, as it is called, has never been observed. Some theories predict the possibility that they exist, though.
Do black holes have a magnetic charge?
A black hole can have an electric charge if it swallows electrically charged objects, but no objects that we know of have magnetic charge. Magnets always have both a north pole and a south pole; there is no evidence that one can exist alone. A lone north or south pole would be called a magnetic monopole, and would have magnetic charge. If we discovered a magnetic monopole and fed it to a black hole then the black hole would gain the magnetic charge.
What is an ampere-turn?
An ampere-turn is the unit of magnetomotive force, the work required to carry a magnetic monopole of unit strength once around a magnetic circuit.
Do bar magnets have south and north poles?
Yes. All magnets of north and south poles. There is no such thing as a magnetic monopole.
Do bar magnets have a north and South pole?
Yes. All magnets of north and south poles. There is no such thing as a magnetic monopole.
Magnetic field intensity of a straight conductor?
magnetic field is a region of space where a north magnetic monopole experiences a force. The direction of the field is by definition the direction of the force on the north end of a magnet. Since most texts contain diagrams of magnetic fields they will not be reproduced here.
Radiation resistance of quarter wave monopole antenna is?
The radiation resistance of quarter wave monopole is 36.5 ohms
Is pushing or pulling force that exist when a magnetic material is near?
Magnetic field
Magnetic charges exists really or is it a assumption?
No, magnetic "charges" do not exist -- magnetic POLES exist, and they exist always as a North-South pair, never separate from each other. If you break a magnet into pieces, each piece will itself be a magnet with N and S sides. The origins of this polarity is found at the atomic level and have to do with spin and orbital electron motions inside atoms. So an electron moving in its atom has both N and S poles. Which is the main difference when comparing to ELECTRIC charges: the positive and negative electric charges are carried by two different particles (the proton and the electron) and can be separated because the proton and the electron exist separate from each other. The magnetic POLES are both carried by the same particle, the electron, and thus do not exist on their own. (You cannot hold a N-pole in one hand and a S-pole in the other.) A lot of researchers have devoted loads of time trying to isolate a magnetic pole. (Looking for a "monopole.") Nobody has succeeded.
Can an electric field exist without a magnetic field?
An electric field can exist even without the presence of a magnetic field. An example of this is a stationary electric field.
Does the compass needle point in the same direction indicated by the magnetic field maximum?
Your compass needle will align itself with the lines of magnetic force at your location. This will diverge from the simple 'earth monopole model' depending on the local magnetic field, and any local geomagnetic anomalies.On most topographic maps, the 'magnetic deviation' and its annual variance will be marked on the map legend. Where i am it is about 25 degrees east of the true magnetic north.
