Are Magnetic Poles and Currents Equivalent Theories in Creating Magnetic Fields?

In summary, magnetic fields are created by the movement of electrically charged particles and are constantly present in the universe. They can be measured using a magnetometer and can be shielded or blocked using certain materials. Magnetic fields have practical applications in powering motors, generating electricity, storing data, and in medical imaging and navigation.
  • #1
bigerst
57
0
what creates magnetic fields, magnetic poles or currents? are those theories equivalent mathematically? i read in Griffiths currents are the sole source of magnetic fields but in another book it said those theories are equivalent. has it been proved the theory of magnetic poles is wrong/ or is it just still a hypothesis?
 
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  • #2
people often use magnetic monopoles in equations, just because it makes things easier. In reality, there are only currents, no magnetic monopoles. But they can cause approximately the same magnetic fields, which is why magnetic monopoles are sometimes used in equations.
 

FAQ: Are Magnetic Poles and Currents Equivalent Theories in Creating Magnetic Fields?

What creates magnetic fields?

Magnetic fields are created by the movement of electrically charged particles, such as electrons. When these charged particles move, they create a force that is felt as a magnetic field.

Are magnetic fields always present?

Yes, magnetic fields are constantly present in the universe. Some sources of magnetic fields include the Earth's core, the sun, and even our own bodies.

How are magnetic fields measured?

Magnetic fields are typically measured using a device called a magnetometer, which can detect the strength and direction of a magnetic field. The unit of measurement for magnetic fields is the tesla (T) or gauss (G).

Can magnetic fields be shielded or blocked?

Yes, magnetic fields can be shielded or blocked using materials such as iron, steel, or mu-metal. These materials redirect the magnetic field away from the area that needs to be shielded.

What are the practical applications of magnetic fields?

Magnetic fields have numerous practical applications, including powering motors, generating electricity, and storing data on computer hard drives. They are also used in medical imaging technologies like MRI machines and in compasses for navigation.

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