Put more coils around it.
yes and no.
Yes (and often are).
No, electromagnets are stronger than bar magnets.
yes. to make it stronger, increase the electric flow.
using a stronger ferromagnetic material for the core. :)
Yes, because electromagnets can lose their magnetism.
Electromagnet two is stronger than electromagnets one and three because it generally has a greater number of coil turns and a larger current flowing through its wire, resulting in a stronger magnetic field being produced. Additionally, the core material used in electromagnet two may be better suited for enhancing the magnetic field strength compared to the cores used in electromagnets one and three.
Electromagnets can be turned on and off by controlling the flow of electricity, while permanent magnets have a fixed magnetic field. This makes electromagnets more versatile and suitable for a wider range of applications. Additionally, electromagnets can produce a stronger magnetic field than most permanent magnets.
Electromagnets...electromagnets are magnets attract, or pull, some kinds of metal objects. Stronger magnets exert a greater pull on the objects they attract. Sometimes it would be useful if you could turn off a magnet when you did not want it to attract objects. That is what an electromagnet can do. Some electromagnets .in power plants and factories electromagnets are very large. You can make a small, simple electromagnet in school or at home.
Electromagnets can be stronger than permanent magnets because the strength of an electromagnet can be adjusted by changing the amount of electric current flowing through its coil. On the other hand, permanent magnets have a fixed magnetic field strength determined by the material they are made from.
My answer id they have different shapes and colors.
Electromagnets' magnetism can be manipulated. Electromagnets can be magnetised and demagnetised by passing electric current. Therefore they are used in motors- which works when the coil is magnetised by passing an electric current. It is also used for cranes.