The metals which are not attracted to electromagnets include aluminium, copper, titanium,brass, bronze, tin, nickel, platinum, gold, silver, lead, pewter. Electomagnetics were first used in the early part of the twentieth century.
magnets themselves, were first discovered and used in the 19th century.
Electromagnets are used to lift heavy weights with a crane, in solenoids, electric motors, generators, transformers, and many other useful applications that are used in industry to make our world function.
Magnets inhabit our world in a million different ways.We use them to stick things on the fridge and to close the fridge door. We often forget the fun we had in science at school, picking up iron feelings and paper clips.
It depends on metal. Surely, metal doesn't mean that the magnet will attract it. Just check the list of magnets itself.
Indeed, the question is connected only to the metals of a specific type. But these metals use not only for play or little ordinary house things. For instance, https://dimetm.com/lifting-electromagnets/electromagnets uses them for cargo lifting, delivery and a lot of other purposes. So it is necessary to have high quality magnet to complete all the functions.
Our electromagnet is not very strong. However, by using many coils of wire and more electricity, an electromagnet can be made much stronger. It can be far more powerful than an ordinary magnet. Things that use electromagnets are telephones, tape, recorders, loudspeakers, cars, refrigerators, television, hair dryers and many other things that have motors in them.
No if you use a copper coin or a silver ring near a magnet, nothing happens. But if you put objects made of iron near a magnet, the magnet attracts them. Magnet attracts paper clips because they are made of steel, which is mostly, iron.
To give you an idea, the simplest form of a true electromagnet would be a coiled wire. An electromagnet basically begins with a battery (even other sources of power may be used) and a wire. If you attach a wire straight from the positive to the negative terminals of a typical D-cell, the electrons flows to the positive end rapidly and the battery quickly drains. Thus typically some sort of load (like a light bulb) is connected in the middle of your wire. A small magnetic field is thus generated.
A great deal stronger magnetic field may be obtained if a "core" of certain paramagnetic or ferromagnetic material (frequently soft iron) is positioned inside the coil. The current which in effect flows through a given wire results in a magnetic field which forms around the wire. This field is oriented as per the right-hand rule.
Visit science.howstuffworks.com for details on how electromagnets work.