What is the relationship between magnetic force and electric force?

In summary, magnetic force is a force that arises from the interaction between magnetic properties of charges. It is perpendicular to the motion of an electric force. Scientists have not been able to explain why we observe but has ony been able to describe what we observe.
  • #1
becauseican8
4
0
Noob, apologies to all.

What is magnetic force? I can calculate it, and know that it is perpendicular to the motion of an electric force, but what is it? Just because I can calculate it does not mean that I know what I am calculating.

Thanks
 
Physics news on Phys.org
  • #2
becauseican8 said:
Noob, apologies to all.

What is magnetic force? I can calculate it, and know that it is perpendicular to the motion of an electric force, but what is it? Just because I can calculate it does not mean that I know what I am calculating.

Thanks

A force is just an influence that causes a change in an object. A magnetic force is simply a force arising from an interaction between the magnetic properties of charges. Does that help?
 
  • #3
becauseican8 said:
Noob, apologies to all.

What is magnetic force? I can calculate it, and know that it is perpendicular to the motion of an electric force, but what is it? Just because I can calculate it does not mean that I know what I am calculating.

Thanks
I believe that you have just asked a question that appeals to the subject of the philosophy of science. Such questions are not about the description of nature but on the why's of nature. Scientists have not been able to explain why we observe but has ony been able to describe what we observe. While we can describe the force on a charged particle we still don't know why there is a force exists or why it does what it does.
 
  • #4
Drakkith: that does actually help to put things in perspective, I suppose I have accepted the reason for other forces while not understanding where they arise from either.

Boston Guy: fair enough, I think that I have simply accepted electric and gravitational forces, but haven't quite accepted magnetic forces yet. Obviously I know they exist, they are directly observable, it is just much harder to envision because I have a chemistry background. Almost everything I've been exposed to so far has been positive and negative electric charges, and even when we did a magnetism experiment, we talked about it in terms of charged ions moving with the magnetic field.
 
  • #5
One way that might help is to go over electrodynamics, where the electric and magnetic fields are sort of unified into one single electromagnetic field tensor. It involves a bit of maths and some time, but it does shed some light on what's going on. In fact, it involves a lot of maths and a lot of time.
 
  • #6
In Special Relativity, the laws of magnetism pop up naturally from the laws of electricity.
You can check out Griffith's introduction to electrodynamics, Ch 10...
 
  • #7
becauseican8 said:
Drakkith: that does actually help to put things in perspective, I suppose I have accepted the reason for other forces while not understanding where they arise from either.

Boston Guy: fair enough, I think that I have simply accepted electric and gravitational forces, but haven't quite accepted magnetic forces yet. Obviously I know they exist, they are directly observable, it is just much harder to envision because I have a chemistry background. Almost everything I've been exposed to so far has been positive and negative electric charges, and even when we did a magnetism experiment, we talked about it in terms of charged ions moving with the magnetic field.
It's true that we do not know what exactly is going on "in reality"; electric and magnetic fields are just models. However, a magnetic field is itself an effect of moving electric charges. So, if you you can intuitively "accept" or understand the existence of such charges (at least as a model) and the fact they can move, then the intuitive understanding of magnetic force isn't far away. :smile:

For the more philosophical aspects, see also the following thread from post #40:
https://www.physicsforums.com/showthread.php?t=510552&page=3
 
  • #8
harrylin said:
It's true that we do not know what exactly is going on "in reality"; electric and magnetic fields are just models. However, a magnetic field is itself an effect of moving electric charges. So, if you you can intuitively "accept" or understand the existence of such charges (at least as a model) and the fact they can move, then the intuitive understanding of magnetic force isn't far away. :smile:

True, I think that I just need to do as Mikey suggests and practice a little. Morgoth, I don't have the book but if it's required for a class or I find it at a good price I will definitely take a look.
 
  • #9
I just put that book's name because I have it...
I guess any book that has to do with electrodynamics, and contains special relativity, will have it...
 

1. What is magnetic force?

Magnetic force is a fundamental force of nature that is created by the movement of electrically charged particles. It is responsible for the attraction or repulsion between objects made of certain materials, such as iron or steel.

2. How does magnetic force work?

Magnetic force is created by the interaction between electrically charged particles. It is caused by the alignment of these particles in a specific direction, resulting in a magnetic field. This field can attract or repel other magnetic objects.

3. What are some examples of magnetic force?

Some common examples of magnetic force include the attraction between a magnet and a piece of iron, the magnetic field of the Earth that causes compass needles to point north, and the magnetic field of a refrigerator magnet that holds papers in place.

4. What are the properties of magnetic force?

Magnetic force has several key properties, including the ability to attract or repel other magnetic objects, its directionality (from north to south), and its ability to exert a force on electrically charged particles.

5. How is magnetic force related to electricity?

Magnetic force and electricity are closely related as they are both caused by the movement of electrically charged particles. In fact, electricity can create a magnetic field and vice versa, a phenomenon known as electromagnetism.

Similar threads

  • Electromagnetism
Replies
7
Views
888
Replies
3
Views
1K
  • Electromagnetism
Replies
15
Views
1K
Replies
5
Views
1K
  • Electromagnetism
Replies
5
Views
2K
Replies
5
Views
693
  • Electromagnetism
Replies
10
Views
1K
Replies
2
Views
501
Replies
1
Views
262
Replies
7
Views
1K
Back
Top