- #1
a.ratnaparkhi
- 30
- 0
What are the causes of magnetism?
What are the causes of magnetism?
- Thread starter a.ratnaparkhi
- Start date
-
- Tags
- Magnetism
In summary, magnetism is caused by the motion of charges, which creates a magnetic field. The exact explanation for this phenomenon is still unknown, but it is believed that frames of reference play a role in understanding it. In one frame of reference, a magnetic field is seen as an electric field in another frame. This concept is further explained in classical electromagnetism and special relativity. However, it may still be difficult to fully comprehend.
- #2
cragar
- 2,552
- 3
In classical E&M moving charges create B fields.
- #3
a.ratnaparkhi
- 30
- 0
what happens in the motion of charges that magnetic fields are created?
- #4
cragar
- 2,552
- 3
To be honest I don't think science knows the answer to that question right now, But i could be worng
- #5
Drakkith
Mentor
- 23,093
- 7,499
a.ratnaparkhi said:
I know one explanation involves frames of reference. What is a magnetic field in one frame of reference is an electric field in another.
See here: http://en.wikipedia.org/wiki/Classical_electromagnetism_and_special_relativity
- #6
a.ratnaparkhi
- 30
- 0
I am still unable to understand it.Drakkith said:
FAQ: What are the causes of magnetism?
What are the causes of magnetism?
Magnetism is a phenomenon that occurs when certain materials have a natural ability to attract or repel other materials. This can occur due to several different causes, including:
How do electric currents cause magnetism?
When an electric current flows through a wire, it creates a magnetic field around the wire. This is because the moving electric charges create a circular magnetic field that is perpendicular to the direction of the current flow. This is the basis of electromagnetism, which is the interaction between electricity and magnetism.
What is the role of electrons in creating magnetism?
Electrons are tiny particles that have a property called spin, which is a form of angular momentum. When a large number of electrons in a material have the same spin direction, they can create a magnetic field. This is known as ferromagnetism and is the reason why materials like iron, cobalt, and nickel are magnetic.
How do atoms contribute to magnetism?
Atoms are made up of positively charged protons, negatively charged electrons, and neutral neutrons. In most materials, the magnetic fields of the electrons cancel each other out, resulting in no overall magnetic effect. However, in materials with unpaired electrons, these magnetic fields can align in the same direction, creating a net magnetic field for the material.
What is the impact of temperature on magnetism?
Temperature can affect the magnetic properties of certain materials. For example, at high temperatures, the atoms in a material vibrate more vigorously, causing the alignment of the electrons' magnetic fields to become disrupted. This can lead to a decrease in the material's magnetic strength or even a loss of its magnetism altogether.
Can external factors affect the strength of a magnet?
Yes, external factors such as temperature, pressure, and magnetic fields can impact the strength of a magnet. For example, heating a magnet can cause its magnetic field to weaken, while exposing it to a strong magnetic field can cause its magnetic strength to increase. Additionally, certain materials, such as iron, can become magnetic when placed in a strong enough magnetic field, but will lose their magnetism once removed from the field.