what can create a magnetic field and what are the things that can be affected by a magnetic field?

Replies

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  hsirah5

  Magnetic field is created by the magnetic force (attractive or repulsive force) towards electromagnetic or ferromagnetic* objects within a range. Therefore the magnetic field at a point depends on the strength of the magnet and the distance from the magnet.
  *- iron, steel, nickel etc. which could be attracted to magnets
  
  Magnetic field can be created by permanent magnets as well as electromagnets. The field created by an electromagnet can be controlled since it strength depends on the magnetic core and the current flow that causes the electromagnetism.
  
  Electromagnetic field can affect the functionality of the electronic, commmunication equipment as they have the capability to disturb communication signals (which are of course EM waves 😀). This type of disturbance is known as ElectroMagnetic Interference (EMI). You can very well observe this EMI effect in cases where your mobile phone gives a buzzing sound when brought near a TV or computer.
  
  
  
  Hope this answers your question.. Let me know if you need more clarification...😎
• 

  sonu sahoo

  any moving charge can produce magneatic feild........its affected by other materials having current brought near to previous one.......if we varying the ac current value then also.......magnetic feild changes
• 

  KZ 259

  an alternator of a car is a good example for a magnetic field.
• 

  Zachary Crane

  Magnetic fields in the context of electrical engineering are usually created by large currents. They can affect nearby circuits by inducing similarly large currents in them.
  
  They generally are generated by, and affect other low impedance circuits.
  
  The crazy thing about magnetic fields s that they can sneak through pretty much anything unless it has a high permeability.