A changing magnetic field, in the conductor, can induce a voltage (and, under the correct conditions, that in turn will result in a current). In the case of a permanent magnet, either the magnet or the conductor has to move.
Motion
Motion
Motion
Yes. Electromagnets don't require a magnetic material; they just require a conductor and an electric current.
A magnet cannot use words to create an electric current. A moving magnet will induce electric current in adjacent conductors. This is usually described in terms of the rate that magnetic flux lines connecting the opposite poles of the magnet "cut" the conductors. The more flux lines cutting the conductors per second, the more current induced.
Electricity is generated when a piece of conductive metal (such as copper) is passed through a magnetic field (or if the magnetic field is moved around the metal). A generator will have a copper wire in the center, surrounded by a magnet shaped like a torus (donut shaped, wire is in the hole in the middle). The wire is stationary. Electricity is generated when the magnet is spun (moving the magnetic field around the wire). This will generate an AC current (alternating current).
because battery supplies a direct current and to make a magnet with using the electrical method you need to supply direct current to the material {metal}which must be wounded with a coil {solenoid}.
An electric current produces a magnetic field.
Water can conduct current, but not as efficiently as a copper wire. There are some applications where a small current is used to sense the level of water through a conductor in an insulated container.
An electromagnet. Unlike other magnets it can be switched on and off.
If the question is "How do you create residual magnetism", one simple answer is as follows... You can "induce" a magnet in ferrous (containing iron) material using another magnet. Take the item you wish to make into a magnet (can be done using a simple magnet and a nail, in home experiments). An old stereo speaker magnet is best as it is relatively easy to find and pretty strong. Rub the magnet evenly and repeatedly ONE WAY down the item you wish to be magnetized (like from the nail head towards the point), almost like you are sharpening a knife. The longer you do this, the better magnet you will create (based on the size and material in your item and the strength of the inducing magnet). Over time, this induction will dissipate and you will have to re-induce the item. A more efficient, and a tiny bit more difficult method is electromagnetic induction, in which you would use a battery and a copper coil wrapped around the nail to create a flow of electrons (current) through the nail resulting in simultaneous magnetism. You can find easy instructions on how to do this just about anywhere on the web. You can SEE this happening by using a magnet near an old TV set screen, the magnet will induce or change the flow of electricity and produce warped colors. Don't use the family TV set, though, the colors sometimes STAY messed up 8). Have fun experimenting 8)
They can induce current which can damage internal computer components.