Bar magnet made from smaller opposing bar magnets

In summary, the strength of a bar magnet constructed from smaller magnets can increase if the smaller magnets are placed in an opposing pole arrangement. This can be observed through a higher magnetic flux density measured with a gaussmeter when rare Earth magnets with opposing poles are jammed together. Fridge magnets are also made with this concept in mind, as arranging them in a certain way can result in either a smooth or "zig-zaggy" motion depending on the alignment of poles.
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mfade
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I was wondering if the strength of a bar magnet constructed from smaller magnets would increase if the smaller magnets were placed in an arrangement where the poles were opposing each other. I was able to jam 2 rare Earth magnets together with opposing poles and measured a higher magnetic flux density with a gaussmeter. My fingers are still in-tact after this ordeal :)

Would there be a higher magnetic flux density from sticking magnets together with opposing polarity than sticking magnets together with non opposing polarity?

I am not a physics expert but was curious about this observation
 
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  • #2
If magnets gather in a place with same NS direction, their magnetic flux enhances to produce larger magnet.
If magnets gather in a place with random NS direction, their magnetic flux kill each other to show zero magnetic field in total.
 
  • #3
Actually fridge magnets are made like this. Here's a fun experiement to do. Take two fridge magnets and try to slide one on top of the other. In one direction the movement will be smooth, in the other it will be quite "zig-zaggy" if that makes sense.

This is because fridge magnets are stacks of magnets with alternating poles:
Schermata 2021-04-05 alle 09.48.52.png

If you arrange the two magnets so that the red and white stripes are aligned, then you will feel the zig zag motion. This is because in one part of the movement the north poles of one magnet will be aligned with the north poles of the other magnet causing a repulsion. As you start to move they will misalign, and the north pole will be closer to the south pole, thus you will feel an attraction.

If you arrange the magnets so that in one the stripes are horizontal, in the other they are vertical then you will not get this effect as there won't be an alignment of poles.
 
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Related to Bar magnet made from smaller opposing bar magnets

1. How does a bar magnet made from smaller opposing bar magnets work?

A bar magnet made from smaller opposing bar magnets works by aligning the individual magnetic fields of each smaller magnet in opposite directions. This creates a stronger overall magnetic field along the length of the bar magnet.

2. Can a bar magnet made from smaller opposing bar magnets be stronger than a single bar magnet?

Yes, a bar magnet made from smaller opposing bar magnets can be stronger than a single bar magnet because the opposing magnetic fields reinforce each other, creating a stronger overall magnetic field.

3. What materials are needed to make a bar magnet from smaller opposing bar magnets?

To make a bar magnet from smaller opposing bar magnets, you will need several smaller bar magnets, a strong adhesive, and a non-magnetic material to use as a base or holder for the smaller magnets.

4. Can a bar magnet made from smaller opposing bar magnets be demagnetized?

Yes, a bar magnet made from smaller opposing bar magnets can be demagnetized if the individual magnets are not securely attached to each other or if the overall structure is exposed to high temperatures or strong magnetic fields in the opposite direction.

5. What are some practical applications of a bar magnet made from smaller opposing bar magnets?

A bar magnet made from smaller opposing bar magnets can be used in various applications, such as in electric motors, generators, and magnetic levitation devices. It can also be used in magnetic therapy for pain relief and in magnetic storage devices like hard drives.

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