Naturally magnetic rocks don't compare to human made magnets.
a naturally occurring magnet composed of a form of iron called magnetite
Not necessarily.
Neodymium magnets are the strongest type of permanent magnets available, with a magnetic field significantly stronger than other types of magnets like ceramic or alnico magnets.
no
An electromagnet is a stronger magnet.
Not if the magnet is symmetrical, and you define 'strength' in terms of flux density.Yes because it has a stronger attraction rate.there is no stronger or weaker for a magnet
No, electromagnets are stronger than bar magnets.
For an electromagnet, increasing either the current or the number of turns of wire will generate a stronger field. For a permanent magnet, the strength is limited by what it's made of. Some materials make better magnets than others. This is a topic in the fields of ceramic engineering and metallurgy, and can't be answered in a simple one-paragraph blurb.
No, they are of exactly equal strength. If it were possible to construct a magnet where one pole was stronger than the other, it would be a violation of one of Maxwell's laws (specifically, div B = 0).
Gorilla Glass is made stronger than normal glass by adding alumina, a type of ceramic material, during the manufacturing process.
MRI systems are significantly stronger than refrigerator magnets, with MRI systems typically having magnetic fields thousands of times stronger than refrigerator magnets.
A magnet always has two poles.They have a magnetic field.Electromagnets can be made much stronger than permanent magnets.A magnet always has two poles.