Magnetic poles and their charges

In summary, the analogy of a magnetic south pole being negative and a magnetic north pole being positive is based on the convention of electric field lines running from positive to negative and magnetic field lines running from North to South. This convention was applied to magnetic field lines after it was established for charge. Additionally, charged particles moving along a magnetic field line do not experience any force from the magnetic field, regardless of the direction of motion.
  • #1
Fiona Rozario
55
1
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 actually charged?
 
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  • #2
The wiki article on magnets discusses the convention:

http://en.wikipedia.org/wiki/Magnet

there is also a picture showing field lines coming from the north and going south so my guess is you are right having established the convention for charge it was applied to magnetic field lines as well.

Also charged particles moving along a magnetic field line feel no force from the magnetic field that could be related to the convention although its true for either direction of motion ie north to south or vice versa...
 

1. What are magnetic poles?

Magnetic poles are the two opposite ends of a magnet, known as the north pole and south pole. These poles have different magnetic charges and are where the magnetic force is strongest.

2. What is the difference between the charges of magnetic poles?

The north pole of a magnet has a positive (+) charge, while the south pole has a negative (-) charge. This is similar to electric charges, except magnetic poles cannot exist alone and always come in pairs.

3. How do magnetic poles interact with each other?

Like charges repel each other, while opposite charges attract. This means that the north poles of two magnets will push away from each other, while the north and south poles will be attracted to each other.

4. Can magnetic poles be separated?

No, unlike electric charges, magnetic poles cannot exist separately. If a magnet is broken into smaller pieces, each piece will still have a north and south pole.

5. How do the magnetic poles of the Earth work?

The Earth's magnetic field is caused by the movement of molten iron in its core. This creates a magnetic dipole, with the north pole near the geographic south pole and the south pole near the geographic north pole. The magnetic poles of the Earth also interact with the magnetic poles of other objects, such as the Sun and other planets.

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