GEOLOGY

Detailed explanation-1: -Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few ‘magnetic’ metals and not all matter. Magnets are attracted to and repel other magnets.

Detailed explanation-2: -When opposite poles of the magnets approach, they attract each other. Any north-south combination will pull them together. But when two like poles come together, they push each other apart. Two north poles will not stick together.

Detailed explanation-3: -Magnets don’t always stick together. It feels like the magnets are surrounded by an invisible rubber layer pushing them apart. That invisible layer is called a magnetic field. Like-poles repel: We can use curvy arrows (called field lines) to draw the shape of the magnetic field around magnets.

Detailed explanation-4: -Magnetic Levitation, MagLev for short, is the process where strong and spatially varying magnetic fields exert forces on an object in such a way that is sufficient to counteract its weight due to gravity, allowing the object to ‘float’ off of the ground.

Detailed explanation-5: -The ends of a magnet can be forced into contact, but the poles aren’t necessarily at the ends. The “lines” don’t point at the ends of the magnets, but at points a little bit in from the ends (roughly half way between the ends and where the letters N and S are).