eletromagnetism

 Edward Dogley
Mind Map by Edward Dogley, updated more than 1 year ago
 Edward Dogley
Created by Edward Dogley almost 6 years ago
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Description

Mind Map on eletromagnetism, created by Edward Dogley on 01/18/2016.

Resource summary

eletromagnetism
  1. magnetic field
    1. any ferrous object can be magnetized or demagnetized
      1. the space around the magnet is called the magnet field. a compass placed in the magnetic field it would align itself along a line of force going toward the south magnet
      2. electromagnetics
        1. an electromagnets is insulated wire wrapped round an iron bar. when a current pasts through the wire a magnet field is created
          1. electromagnetics can be use for scrapyard crane, circuit breaker, electric bell and a relay
          2. the motor effect
            1. electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves
            2. the generator effect and a.c. genertors
              1. An electric current is produced when a magnet is moved into a coil of wire in a circuit. The direction of the current is reversed when the magnet is moved out of the coil.
                1. a.c. generator Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field
                2. transformer
                  1. A transformer changes the potential difference of electricity. It only works with alternating current
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