Gravitational forces that make things fall down to the ... Iron fillings reveal a magnet's magnetic field. You can see a magnet's magnetic field by scattering tiny iron filings around it.

If you took introductory physics, you learned about the “fundamental forces.” It goes something ... This will create a magnetic field, and other wires with electric current will experience ...

How a tokamak works: The electric field induced by a transformer drives a current ... Both reactor types make use of the fact that charged particles react to magnetic forces. Strong magnets in the ...