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24 Cards in this Set
- Front
- Back
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Magnetic oxide of iron
Fe3O4 |
Lodestone
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Helped find water
natural occurring magnet used as a compass by Chinese |
Lodestone
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SI Unit of magnetic field strength
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Tesla
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Any charged particle in motion creates..
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a magnetic field
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The magentic field of a charged particle (such as an electron in motion) is .... to the motion of the particle.
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Perpendicular
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Electrons behave as if they rotate on an axis, either clockwise or counter clockwise. Rotation creates and electron spin which creates a .....
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Magnetic field
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the proton in a hydrogen nucleus spins on its axis and creates a "...." (the basis of MRI)
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Magnetic Moment
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ability of a material to attract the lines of the magnetic field intensity.
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Magnetic Permeability
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Natural
Artificial permanent Electromagnets |
Classification of Magnets
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Magnets are classified according to the origin of the
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Magnetic Property
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Usually made of iron,
typically produced by aligning the domains in the field of an electromagnet |
Permanent Magnets
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Consists of wire wrapped around an iron core. When electric current is conducted through the wire, a magnetic field is created.
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Electromagnets
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All mtter can be classfied according to the manner in which it interacts with an ...
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External Magnetic Field
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Ferromagnetic
Paramagnetic Diamagnetic Nonmagnetic |
Classification of Materials
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Unaffected by magnetic field
material: wood, glass |
Nonmagnetic
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Weakly repelled from both poles of a magnetic field,
Material: Water |
Diamagnetic
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Weakly attracted to both poes of a magnetic field,
Material: Gadolinium |
Paramagnetic
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Can be strongly magnetized
Material: Iron, nicklel, Cobalt |
Ferromagnetic
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Dividing a magnet will ...
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create two smaller magnets
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Ends are called poles (north and south) compared to ....
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negative and positive charges
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Like poles of a magnet ..., unlike poles ...
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Repel; Attract
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Materials can be made magnetic one from another by ...
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Induction
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Magnetic force is inversely proportional to ....
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the square of distance between the objects under consideration.
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If the distance between two bar magnets is halved, the magnetic force ...
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increases by four times.
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