How to judge the pole face of a magnet?

When evaluating the pole face of a magnet, ensuring accurate judgment is critical. The quality of a magnet's pole face directly affects its performance and reliability in a variety of applications.

Neodymium Permanent Magnets

From surface flatness to consistency of magnetic strength, every detail determines the actual effect of the magnet. This article will explore how to effectively evaluate and judge the pole face of a magnet to ensure optimal performance during selection and application.

There are a few simple ways to judge:

1) The N marked on the magnet is the North Pole and the S is the South Pole.

2) Use a known magnetic pole of the magnet end to close to the end of the magnet, if they repel each other, their magnetic poles are the same, otherwise the opposite.

3) Hang the magnet with a thin thread, one end to South is the South Pole, the other end is the North Pole.

4) To determine the N and S poles of a magnet, bring one end of the magnet near an energized solenoid with known polarity. First, apply the right-hand rule to determine the N and S poles of the solenoid based on the direction of the current.

Then, using the principle that "like magnetic poles repel and unlike magnetic poles attract", determine the N and S poles of the bar magnet. Alternatively, suspend the bar magnet on a thin, flexible string so that it can rotate freely, and then bring it near the energized solenoid.

The end of the magnet that turns towards the N pole of the solenoid is the S pole of the magnet, and the end that turns towards the S pole of the solenoid is the N pole of the magnet.

5) The simplest way is to find a compass, when the compass is stable, take a pole of the magnet to close to the N pole of the compass, if the repulsion is the same pole, if the attraction is very different.

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