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113 > Midterms | Unit 2.2 Magnetism > Flashcards

Midterms | Unit 2.2 Magnetism Flashcards

1
Q

A fundamental property of forms of matter

A

Magnetite

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2
Q

Smallest unit of magnetism

A

It has no smallest unit

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3
Q

Samples of Magnetite

A

o Oxide of iron (Fe3O4)
o Lodestone or leading stone

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4
Q

Any charged particle in (1) creates a (2)

A
  1. motion
  2. magnetic field
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5
Q

A property created when electrons behave as if they rotate on its axis

A

Electron Spin

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6
Q

Electron Spin is neutralized in

A

Electron pairs

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7
Q

It creates a magnetic field

A

Electron Spin

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8
Q

The lines of a magnetic field are always —

A

closed loop

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9
Q

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

A

Magnetic Moment

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10
Q

Basis for MRI

A

Magnetic Moment

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11
Q

Any material that produces a magnetic field

A

Magnets

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12
Q

Has north and south pole

A

Magnets

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13
Q

Magnets that have two poles

A

Bipolar/ Dipolar

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14
Q

The small magnet created by the electron orbit

A

Magnetic Dipole

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15
Q

An accumulation of many atomic magnets with their dipoles aligned

A

Magnetic Domain

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16
Q

The ability of a material to attract the lines of magnetic field intensity

A

MAGNETIC PERMEABILITY

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17
Q

Example of material with high and low magnetic permeability

A

High magnetic permeability: Iron
Low magnetic permeability: Wood

18
Q

The degree to which a material can be magnetized

A

MAGNETIC SUSCEPTIBILITY

19
Q

Example of material with high and low magnetic susceptibility

A

High magnetic susceptibility: Iron
Low magnetic susceptibility: Wood

20
Q

Types of magnets

A
  • Natural magnet
  • Artificial-Permanent Magnet
  • Electromagnets
21
Q

A magnet that gets its Magnetism from the Earth

A

Natural magnet

22
Q

Example of a natural magnet

A

Lodestone

23
Q

A magnet whose Magnetism is induced artificially-produced

A

Artificial-Permanent Magnet

24
Q

Example of an artificial-permanent magnet

A

Compass

25
Q

A bar or horseshoe-shaped magnet

A

Artificial-Permanent Magnet

26
Q

A coil of wire wrapped around an iron core that intensifies the magnetic field

A

Electromagnet

27
Q

All matters can be classified into how it interacts with the —

A

external magnetic field

28
Q

4 magnetic states of matter

A
  • Nonmagnetic
  • Diamagnetic
  • Paramagnetic
  • Ferromagnetic
29
Q

Unaffected by the magnetic field

A

Nonmagnetic

30
Q

Example of nonmagnetic

A

Wood and glass

31
Q

Weakly repelled from both poles of a magnetic field

A

Diamagnetic

32
Q

Example of diamagnetic

A

Copper, water & plastic

33
Q

Weakly attracted to both poles of a magnetic field

A

Paramagnetic

34
Q

Example of paramagnetic

A

Gadolinium (Gd-64): contrast agent in M.R.I.

35
Q

It can be strongly magnetized

A

Ferromagnetic

36
Q

Examples of ferromagnetics

A

AlNiCoFe (Al-12, Ni-28, Co-27) & Iron (Fe-26)

37
Q

An excellent temporary magnet

A

Soft iron

38
Q

MAGNETIC LAWS

A

▪ Like magnetic poles repel
▪ Unlike magnetic poles attract
▪ Imaginary lines of magnetic field enter the south pole
▪ Imaginary lines of magnetic field leave the north pole

39
Q

The force of attraction between unlike poles or repulsion between like poles

A

Magnetic Force

40
Q

Where is magnetic force directly and inversely proportional to?

A

Directly proportional to the product of the magnetic pole strengths

Inversely proportional to the square of the distance between them

41
Q

SI unit for magnetic field

A

o SI Unit: tesla (T)
o Older unit: gauss (G)

42
Q

How many gauss (G) in 1 tesla (T)?

A

1 T: 10,000 G

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