Sagot :
1. A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
2. The Attraction of Charges
Opposite poles of a magnet attract each other, whereas like poles repel each other. When lined up with a south-seeking pole, a north-seeking pole would draw closer to that end of the magnet.
3. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges. Like charges repel, and unlike charges attract.
4. Magnets only attract certain types of metals including “IRON, STEEL, NICKEL, and COBALT”. Other materials such as glass, paper, plastic, and wood are not attracted by magnets. Most metals are not attracted including copper, silver, gold, magnesium, platinum, and aluminium.
I only saw four examples in number 4
I HOPE IT HELPS (≧▽≦)