Answer: There are a lot of answers, so I will give a short answer to everyone:
1) The magnetic objects only come in dipolar form, so the poles attracted to each other are the different poles (negative to positive9
2) Magnets are surrounded by a field called Magnetic Field.
3) Bar magnets have two poles, as i already said, magnets commonly come in dipolar (two) forms.
4) Ferric materials, so the correct option is iron, cobalt, and nickel.
5) Electrons are the fundamental negative charges. Are the ones responsible of the electromagnetism (which includes the magnteism)
6) False, the magnetic field strength decreases as the distance to the source increases.
7) Electromagnets, as the name implies.
8) Turkish is actually the only benefit, the problem is that they need energy to work, so electromagnets are not actually beneficial for the environment.
9) by the molten iron in the Earth's core.
10) True, doorbells use magnetic fields to make a small piece of metal to vibrate and impact against metal to make noise, scrap yards are moved with big magnets, and the electric guitar and basses need electromagnetism to work, the pickups on those instruments have tiny magnets inside.
11) False, electromagnets do not have theoretical a limit on the magnetic field that they can create.
12) The diagram is missing.
The magnets will connect only if the poles that are facing each other are different.
