# Magnetism & Electricitymr. Mac's Class 2019 20

1. Magnetic Field

We all knew the basics of magnets and magnetism - magnets attract specific metals, and they have north and south poles. Opposite poles attract each other while like poles repel. Magnetic and electrical fields are related, and magnetism, along with gravity and strong and weak atomic forces, is one of the four fundamental forces in the universe. Discuss ion; summary; practice; problems; resources; Summary. A magnet is an object that exhibits magnetic properties such as exerting an attractive. Magnetism Magnetismis a phenomenon described by Sir WilliamGilbert, court physician to Queen Elizabeth I, which is nothing more than simple electrical polarizationof an object and/or the electric field shape around a molecule. Nov 06, 2019 Magnetism is defined as an attractive and repulsive phenomenon produced by a moving electric charge. The affected region around a moving charge consists of both an electric field and a magnetic field. The most familiar example of magnetism is a bar magnet, which is attracted to a magnetic field and can attract or repel other magnets. A Child’s Puzzle Has Helped Unlock the Secrets of Magnetism People have known about magnets since ancient times, but the physics of ferromagnetism remains a mystery. Nvms7000 on mac. Now a familiar puzzle is getting physicists closer to the answer.

## Magnetism

Magnets are objects, which can attract, or pull, on some metals, like iron and steel. If you rub a piece of steel with a strong magnet, the piece of steel will because a magnet too. It has become magnetized. Other metals, like copper or gold, are not attracted to magnets. Magnets can also attract each other, but only if they face in opposite directions. A magnet has two ends called poles; one end is the north pole and the other is the south pole. A north pole will attract a south pole; the magnets pull on each other. But the two north poles will push each other away. We say the magnets repel each other. Magnets seem to act something like positive and negative electric charges. Electricity and magnetism are very closely related.

If the words north and south remind you of anything, the earth is in fact a giant magnet. A compass is a tiny magnet balanced on a point so it can turn freely. The magnet is attracted by the earth’s magnetic north pole and always points in that direction.

## Magnetic Field

A good way to see how the magnet attracts is to do the following experiment. Take a strong bar magnet and putt a piece of pare over it. Then sprinkle some iron filings on the paper. The iron fillings will make a pattern. This pattern shows the magnetic field. The drawing below shows what the magnetic field looks like for a bar magnet (although the lines don’t really exist). Now try it with two magnets. Point their north poles at each other. The iron filings show how the magnetic field looks when the magnets repel. Now turn one magnet in the other direction to see how the magnets attract.