How do magnets attract?

30 Tháng Bảy, 2018

Magnets attract some metal objects, like metal paper clips. How do magnets attract metals? When you bring a magnet near some metal objects, the metal objects actually become magnets. Here’s how:

  1. Magnets are made of metals. Metals are made of tiny particles. These particles are like tiny magnets. Inside a magnet, these tiny magnetic particles are all lined up. All the north poles face one direction. All the south poles face the other.

 

  1. Magnets attract certain metals, such as iron, nickel, and cobalt. If a metal is not a magnet, the metal still has tiny magnetic particles inside. However, they are not lined up. North poles and south poles are facing many different directions.

  1. Bring a bar magnet or any other permanent magnet near a piece of iron, nickel, or cobalt. The tiny magnetic particles turn around and line up. The metal becomes a temporary magnet. This temporary magnet attracts the bar magnet.
  2. Take the permanent magnet away from the piece of metal. Usually, the tiny particles move around and face many directions again.

 

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