MAGNETISM Flashcards

1
Q
  • one of the strongest naturally working
  • oxide of iron (Fe304)
  • Lodestone/ Leading Stone
A

Magnetite

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2
Q
  • a property created when electrons behave as if they rotate on its axis
  • is neutralized in electron pairs
  • unlike poles does not contribute that much of like poles
  • lines of a magnetic field are always closed loop
A

Electron Spin

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3
Q
  • a nuclear magnetic dipole created when a magnetic field is created by a spinning electric charge
A

Magnetic Moment

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4
Q
  • the basis of MRI
A

Hydrogen Atom

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5
Q
  • any material that produces a magnetic field
  • has a north and south pole
A

Magnets

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6
Q
  • magnets that have 2 poles
A

Bipolar/ Dipolar

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7
Q
  • small magnet created by the electron orbit
A

Magnetic Dipole

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8
Q
  • an accumulation of many atomic magnets with their dipoles aligned
  • 2 stages random, aligned
A

Magnetic Domain

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9
Q
  • the ability of a material to attract the lines of a magnetic field
A

Magnetic Permeability

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10
Q
  • the degree to which a material can be magnetized
A

Magnetic Susceptibility

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11
Q
  • type of magnet that gets its magnetism from the earth
  • e.g. lodestone
A

Natural Magnet

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12
Q
  • type of magnet whose magnetism is induced artificially produced
  • a bar or horse shoe shaped magnet
A

Artificial - Permanent Magnet

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13
Q
  • type of magnet that requires electricity
  • a cole of wire wrapped around an iron core that intensifies magnetic field
A

Electromagnets

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14
Q
  • magnetic state that is unaffected
  • wood and glass
A

Non-Magnetic

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15
Q
  • magnetic state that is weakly repelled from both poles
  • copper, wire and plastic
A

Diamagnetic

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16
Q
  • magnetic state that is weakly attracted to both poles
  • Gd-64 Gadolinium = contrast agent for MRI
A

Paramagnetic

17
Q
  • magnetic state that is strongly magnetized
  • AlNiCoFe (Al-13, Ni-28, Co-27, Fe-26)
A

Ferromagnetic

18
Q
  • an excellent temporary magnet
  • can be magnet if placed near a magnetic field
A

Soft Iron

19
Q
  • like magnets repel
  • unlike magnets attract
A

Magnetic Laws

20
Q
  • imaginary line of magnetic field? =s
A

Enter South Pole

21
Q
  • imaginary line of magnetic field =n
A

Leave North Pole

22
Q
  • magnetic field strength si unit, older unit, conversion
A

Tesla (T), Gauss (G), 1T = 10,000G