Electric And Magnetic Fields
Electric and magnetic fields are invisible areas of energy often referred to as radiation that are associated with the use of electrical power and various forms of natural and man made lighting EMFs are typically characterized by wavelength or frequency into one of two radioactive categories.
Electric Current And Magnetic Fields
Magnetic Fields sources are essentially dipolar in nature, having a north and south magnetic pole.
Here it shows Two types of magnet drawings were it shows that the N side always goose to the S side and in which direction
Magnetic Lines Of Force
Here It shows a horseshoe magnet and a Bar magnet and how the magnetic force works on both of them.
The Earth Magnetic Field
There is a really big amount of Magnetic Field around the earth as you cud see here. All around the earth.