Physics magnets
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- Hey Lia, can you help me with my upcoming physics test? I’m confused with the topic of magnets.
- Hey Emma, sure.
- START
- So, magnets only attract some materials which are called ferro-magnetics. The poles of the magnet are placed on each side and have the same length. A magnet can also be used as a compass if it is swung to the direction of the north and south poles.
- If like poles of the magnet are placed near each other they repel but if they are unlike poles they attract the force decreases if they are further from each other. Metals like iron or steel have different magnetism, when iron is attached and detached, it loses its magnetism and is called a soft magnetic material, while steel does not lose its magnetism and therefore is called a hard magnetic material.
- Wow, you know a lot about this topic. Did you know that the space surrounding a magnet which produces the magnetic force is called the magnetic field? I also heard that whenever a metal is near the magnet it will travel on the line of force and that the direction of the field should be the direction of the force on the N pole.
- Yes that’s right. We can also map magnetic fields using a plotting compass. By placing the magnet and the compass near each other and marking the positions, we can then see the patterns of the magnetic fields around both the poles. When two a-like poles are facing each other, the point in the center of the two magnets is called a neutral point, this happens because the forces cancel out each other.
- So that’s how it works, thanks for helping me, I hope I will pass the test.
- You’re welcome, and don’t worry I'm sure you will, let’s go home now.
- END
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