Magnets are everywhere.
They can be permanent or non-permanent, both types ranging in size from tiny to enormous. You can find them in domestic appliances, heavy industrial equipment, and even relatively simple everyday tools such as screwdrivers. So it is completely unsurprising for your other non-magnetic belongings to become partially magnetized after touching a magnet or remaining near it even for a short duration.
Image credit: Rusty Gouveia via Pixabay, free licence
As you probably already know, there are tools called demagnetizers, or degaussers, the purpose of which is to remove a magnetic field from where it is not needed, and sometimes even to add a magnetic field to a ferromagnetic part, temporarily. In this way you can turn, for example, a non-magnetic srewdriver into magnetic one, and to demagnetize it again after awhile.
So is it difficult to change magnetic properties of an object? What is inside in a demagnetizer, and how does it work? Watch the following video to find out answers to these questions:
:quality(70)/cloudfront-eu-central-1.images.arcpublishing.com/irishtimes/CGYPT6WE7VAO3KJ773SHUVMVBY.jpg?resize=1200,630&ssl=1)
