Taken from Quiz #1
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| Ability of Certain Materials to attract iron, cobalt or nickel. | Magnetism (Cobalt and Nickel have to be in their purest form)
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| What is the most common element used for magnets? | Nickel
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| Electrons spinning in prodominantly one direction create a tiny magnet refered to as | A Magnetic Dipole
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| When many of these magnetic dipoles align with each other they create an organized grouping called (use a strong magnetic field to align the dipoles) | A Magnetic Domain
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| Each atom will have a North and South pole | Dipole
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| Lines of force in space | Flux
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| Lines of force in opposing directions attract each other | Magnetic Attraction
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| Lines of the force in the same direction repel each other | Magnetic Resistance
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| First Law of Magnetism | 1. Every magnet has a North and South pole.
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| Second Law of Magnetism | 2. Like poles repel and unlike poles attract each other.
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| Third Law of Magnetism | 3. force of attraction (or repulsion) varies directly as the strength of the poles and inversely as the square law of the distace between them. (Yes, inverse square law
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| Strength of a Magnetic Field (SI Unit | tesla (T)
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| Any spinning electric charge will induce a ____________ | Magnetic Field
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| If every electric charge creates a magnetic field , why is it that everything is not magnetic? | The magnetic field will end up cancelling each other out.
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| Natural Magnets | Lodestones
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| Lodestones are found ___ ___ _______ | in the earth
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| Lodestones consists of an ________. | iron ore
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| Artificial Permanent Magnet | manufactured by magnetic induction
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| Electromagnetic | Iron bar wrapped with a wire carrying eletric current. (ONLY magnetic when electricity is flowing through it)
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| Nonmagnetic Materials | Not affected by magnetic fields (ie. glass, wood, plastic)
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| Diamagnetic Materials | Weakly repelled by magnetic fields (ie water, mercury and gold)
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| Paramagnetic Materials | Weakly attracted by magnetic fields. (ie platinum, gadolinium, aluminum)
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| Ferromagnetic Materials | Strongly attracted to magnet (ie iron, cobalt, nickel)
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| A stronger field will magnetize the material more _____ | Strongly
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| Rubbing Ferromagnetic material against a permanent magnet also helps ________. | Bring the atoms into alignment
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| Heating or dropping a magnet can ______ | Knock some of the atoms out of alignment thus weakening the magnetic field.
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| Superconducting Magnet | Used in MRI Resistance is at zero. Current still going.
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