Senin, 26 November 2012

Magnetic Field


Magnetic fields are produced by electric currents, which can be macroscopic currents in wires, or microscopic currents associated with electrons in atomic orbits. The magnetic field B is defined in terms of force on moving charge in the Lorentz force law. The interaction of magnetic field with charge leads to many practical application. Magnetic field sources are essentially dipolar in nature, having a north and south magnetic pole. The SI unit for magnetic field is the Tesla, which can be seen from the magnetic part of the Lorentz force law Fmagnetic = qvB to be composed of (Newton x second)/(Coulomb x meter). A smaller magnetic field unit is the Gauss (1 Tesla = 10,000 Gauss).






Magnetic fields are different from electric fields. Although both types of fields are interconnected, they do different things. The idea of magnetic field lines and magnetic fields was first examined by Michael Faraday and later by James Clerk Maxwell. Both of these English scientists made great discoveries in the field of electromagnetism. 





Magnetic fields are areas where an object exhibits a magnetic influence. The fields affect neighboring objects along things called magnetic field lines. A magnetic object can attract or push away another magnetic object. You also need to remember that magnetic forces are not related to gravity. The amount of gravity is based on an object's mass, while magnetic strength is based on the material that the object is made of. 





If you place an object in a magnetic field, it will be affected, and the effect will happen along field lines. Many classroom experiments watch small pieces of iron line up around magnets along the field lines. Magnetic poles are the points where the magnetic field lines begin and end. Field lines converge or come together at the poles. You have probably heard of the poles of the Earth. Those poles are places where our planets field lines come together. We call those poles north and south because that's where they're located on Earth. All magnetic objects have field lines and poles. It can be as small as an atom or as large as a star.



10 komentar:

  1. Different magnetic fields from electric field. Although both types of fields that are interconnected, they do different things. The point of that statement?

    BalasHapus
  2. why the same charge having a repultion force but if the charge is different having an attractive force?

    BalasHapus
  3. Good,
    but try to add animated ones, i'm sure making it easier to understand
    Keep spirit ya...

    BalasHapus
  4. thanks for information
    ..maybe you can tell me about different of magnetic field and electric field as easy to understand??

    BalasHapus
  5. I want ask you about something, if two of magnetic poles is closed to each other it will make attraction, so does the distance affect the force of the attraction? does the distance is fixed?

    BalasHapus
  6. Can you give me an example of the use of magnetic field in their daily lives????

    BalasHapus
  7. Can you give me an example of the use of magnetic field in their daily lives????

    BalasHapus
  8. thank's for information..
    i want to question, what would happen if the polar attractive forces adjacent same ?

    BalasHapus
  9. I do not understand the sentence It can be as small as an atom or as large as a star.

    BalasHapus
  10. Nice Blog, I want to ask, how about pold magnetic in circular magnet?
    Thank you

    BalasHapus