The poles of an electromagnet can change depend inf on the current supplied.
Yes, they have already built trains which are held above the track by magnetic fields, they are called Maglev trains(magnet levitation).
a magnet with many lines of force is STRONG
The magnetic force of a magnet is called magnetism.
No, a magnet is a physical object. However, a magnet can EXERT a force.
Yes. Placing a rotating magnet below it can generate a magnetic field that creates a spin in the suspended magnet. If the magnet is mounted on a low-friction axis, bringing an opposite pole toward one side of the magnet, then removing it, will add force to spin it for awhile.
The force that helps a ship float is the buoyant force. The buoyant force is exerted by a fluid upwards that opposes the weight of the object immersed.
creates magnetic force
electromagnet
That is not rightit has to be Every magnet has one pole.
Because the magnet is not the same force as the paperclip!
Yes, as the distance of the magnet increase its magnetic force decreases
a magnet gets excited because of the force in it