This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...

Changes in the field can also play havoc with satellite communication and electric infrastructure, disrupting the modern world in a big way. Given the importance of this gargantuan bar magnet in our ...

How a Generator Works When an electric current flows through a wire, it generates a three-dimensional magnetic force field around the wire, similar to that surrounding a bar magnet. Magnets are ...

Reader Jayant Bhalerao, a college physics instructor, found the story useful in class: “We will share it with our students, so that they can appreciate how ...

Earth has a magnetic field which appears very similar to a bar magnet that has a north and south pole. However, it is not comparatively stable since it gets generated by complex processes which ...