How to determine the polarity of a square shaped magnet?

Nov 04, 2025|

Hey there! As a supplier of square shaped magnets, I often get asked about how to determine the polarity of these little guys. It might seem like a tricky thing to figure out, but with the right methods, it's actually not that hard. In this blog, I'll share some easy - peasy ways to determine the polarity of a square shaped magnet.

Why is Polarity Important?

Before we dive into the methods, let's talk about why knowing the polarity of a magnet is important. Different applications require specific polarities. For instance, in a motor, the correct alignment of magnetic polarities is crucial for its proper functioning. If you get the polarities wrong, the motor might not work at all or could even get damaged. So, getting a handle on polarity is a big deal when you're working with square shaped magnets.

Using a Compass

One of the simplest and most reliable ways to determine the polarity of a square shaped magnet is by using a compass. You've probably seen a compass before - it's that handy little device with a magnetic needle that always points north.

Here's how you do it. First, place the square magnet on a flat surface. Then, take your compass and slowly bring it close to one of the corners of the magnet. As you get closer, you'll notice that the needle of the compass will start to move.

The end of the compass needle that usually points north is called the north - seeking pole. When you bring the compass near the magnet, the north - seeking pole of the compass will be attracted to the south pole of the magnet. So, if the north - seeking pole of the compass is drawn towards a particular corner of the square magnet, that corner is the south pole of the magnet. And the opposite corner will be the north pole.

This method is super easy and doesn't require any special equipment other than a basic compass. You can find compasses at most hardware stores or even in some school supply shops.

The Hanging Magnet Method

Another cool way to figure out the polarity is by using the hanging magnet method. You'll need a piece of string for this one.

Tie the string around the middle of the square magnet so that it can hang freely. Make sure it's balanced and can rotate easily. Once it's hanging, give it a little spin and then let it come to rest.

The Earth has its own magnetic field, and the magnet will align itself with this field. The end of the magnet that points towards the Earth's geographic north is the north pole of the magnet, and the end that points towards the Earth's geographic south is the south pole.

Flat Square MagnetsSquare Magnet With Hole

This method might take a little longer because you have to wait for the magnet to stop spinning and settle into its natural position. But it's a fun experiment and a great way to understand how magnets interact with the Earth's magnetic field.

Using Another Known Magnet

If you have another magnet whose polarity is already known, you can use it to determine the polarity of your square shaped magnet.

Let's say you have a bar magnet with the north and south poles clearly marked. Take the bar magnet and bring one of its poles close to one of the corners of the square magnet.

Remember the basic rule of magnets: opposite poles attract, and like poles repel. So, if the north pole of the bar magnet is attracted to a corner of the square magnet, that corner is the south pole of the square magnet. And if it's repelled, that corner is the north pole.

This method is really useful when you have a collection of magnets and you need to quickly figure out their polarities.

Our Square Shaped Magnet Offerings

At our place, we offer a wide range of square shaped magnets. Whether you need Square Magnet with Hole for some specific DIY projects, Tiny Square Magnets for more delicate applications like jewelry making, or Flat Square Magnets for industrial uses, we've got you covered.

Our magnets are made with high - quality materials, ensuring strong magnetic fields and long - lasting performance. And with our knowledge of magnets, we can also help you with any questions you might have about using them, including determining their polarities.

Conclusion

Determining the polarity of a square shaped magnet isn't as difficult as it might seem. Using a compass, the hanging magnet method, or another known magnet are all effective ways to figure it out.

If you're in the market for square shaped magnets for your projects, don't hesitate to reach out. We're here to provide you with the best quality magnets and the support you need. Whether you're a hobbyist or a professional, we can work together to find the perfect magnets for your needs. Contact us to start the procurement process and let's get your projects rolling!

References

  • "Magnetism and Its Applications" - A general physics textbook that covers the basics of magnetism and magnetic fields.
  • Online resources from educational institutions that provide detailed explanations of magnetic properties and experiments.
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