Magnetism: Annotated By Magnetic Fields

Magnetism

We are all acquainted with the little toys that stick together to form interesting shapes or those that stick to the refrigerator; this is because of magnetism. Magnetism is a class of physical phenomena that ____________ mediated by magnetic fields. What causes magnetism? Scientist have two theories: the Doman Theory and the Atonic theory. The Doman theory explains what happens inside the materials when they are magnetized. In an unmagnetized aerial the domains are randomly arranged so there is an overall magnetic field. When you magnetize a material by shooting a bar magnet over it repeatedly in the same direction, the domains re-arrange so their magnetic fields align. The other theory is the Atomic theory explains that magnetism is created with electricity.

Temporary magnets are called electro magnets. You make and electro-magnet when you press a button and an electric current flows through a wire and activates lights or power switches. Virtually all the electricity we use is made by devices called, generators. These use powerful magnets and coils of wire to produce electricity with the help of turbines. How so you get

You would be surprised by how much really uses magnetism. Every day electric appliances with an electric motor, some cars, electric toothbrushes, and some lawnmowers. Motors use electricity to generate temporary magnetism in wire coils. The magnetic field that produced pulses against the fixed field of a permanent magnet, spinning the inside part of the motor around at high speed. There are magnets in your refrigerate holding the door closed. Magnets read and write data on your computer hard drive and on an old cassette tapes. Magnets in your hi-fi loud speakers or headphones help to turn stored music back into sounds you can hear. If you’re sick with a serious internal illness you might have a body scan called NMM, which draws the world beneath your skin using patterns of magnetic