Electricity & Magnetism MAGNETISM Fact Sheet Below are some basic facts about magnets and how they behave: A magnet is a material containing ________, and is called a __________________ material. The 4 primary ferromagnetic materials are denoted by INCS: _________, ___________, ___________ and ____________. The “king” of all ferromagnetics is _________. A magnet has two ends called _________, one of which is called a north pole or north-seeking pole, while the other is called a south pole or south-seeking pole. The north pole of one magnet attracts the south pole of a second magnet, while the _______ pole of one magnet repels the other magnet's _______ pole. So, we have the common saying: like poles ________, and unlike poles _________. A magnet creates an invisible area of magnetism all around it called a ___________ ____________, consisting of _________ of _________. The lines of flux are _______________; they __________ the north pole of a magnet and __________ the south pole. As with the Earth, gravity is based on __________, while magnetism is based on the ___________ that the object is made of. If you cut a bar magnet in half you get ______ brand new, smaller magnets, each with its own north and south pole. In an unmagnetized material, the magnetic domains are pointing in ___________ directions, while in a magnetized material the domains are ___________ to each other. _______________ is the effect by which electric currents produce magnetic fields. When an electric current flows, a ___________ ___________ is created and whenever a magnet moves, an ____________ ____________ is produced. Magnetism operates on the __________ level, with the negatively charged _____________ and positively charged ____________. Electricity & Magnetism MAGNETISM Fact Sheet ANSWER KEY Below are some basic facts about magnets and how they behave: A magnet is a material containing iron, and is called a ferromagnetic material. The 4 primary ferromagnetic materials are denoted by INCS: iron, nickel, cobalt and steel. The “king” of all ferromagnetics is iron. A magnet has two ends called poles, one of which is called a north pole or north-seeking pole, while the other is called a south pole or south-seeking pole. The north pole of one magnet attracts the south pole of a second magnet, while the north pole of one magnet repels the other magnet's north pole. So we have the common saying: like poles repel, and unlike poles attract. A magnet creates an invisible area of magnetism all around it called a magnetic field, consisting of lines of flux. The lines of flux are directional; they exit the north pole of a magnet and enter the south pole. As with the Earth, gravity is based on mass, while magnetism is based on the material that the object is made of. If you cut a bar magnet in half you get two brand new, smaller magnets, each with its own north and south pole. In an unmagnetized material, the magnetic domains are pointing in random directions, while in a magnetized material, the domains are parallel to each other. Electromagnetism is the effect by which electric currents produce magnetic fields. When an electric current flows, a magnetic field is created and whenever a magnet moves, an electric current is produced. Magnetism operates on the atomic level, with the negatively charged electrons and positively charged protons.