Magnetic Properties (Concepts)

Question 1

“movers and shakers” of modern technology

Answer 1

Magnets

Question 2

• Magnets have a north and a south pole
• The direction of moment is from south to north

Answer 2

Magnetic Dipole

Question 3

____________ never cross. They don’t start or stop anywhere; they always make closed loops and will continue inside a magnetic material (though sometimes they are not drawn this way).

Answer 3

Magnetic field lines

Question 4

magnetic forces are generated by moving ________ charged particles

Answer 4

electrically

Question 5

Which part of the atom is the source of magnetic properties?

Answer 5

ELECTRONS

Question 6

most fundamental magnetic moment is the _____________

Answer 6

BOHR MAGNETON

Question 7

Two Types of Electron Motion

Answer 7

1. Spin Magnetic Moment
2. Orbital Magnetic Moment

Question 8

As _____ charge is put in more motion, the strength of a magnetic field increases.

Answer 8

more

Question 9

The externally applied magnetic field, sometimes called the _______, is designated by H

Answer 9

magnetic field strength

Question 10

represents the magnitude of the internal field strength within a substance subjected to H

Answer 10

Magnetic Flux Density

Question 11

the ability of a material to support the formation of a magnetic field within itself

Answer 11

Magnetic Permeability

Question 12

when a magnetic material is placed near a magnet… the magnetic moment align and reinforce the existing field

Answer 12

Magnetization of Solid

Question 13

indicates whether a material is attracted or repelled out of a magnetic field

Answer 13

Magnetic Susceptibility

Question 14

5 Types of Magnetism

Answer 14

1. Diamagnetism
2. Paramagnetism
3. Ferromagnetism
4. Antiferromagnetism
5. Ferrimagnetism

Question 15

substances have zero net magnetic moment because they have the same number of electrons of opposing spin

Answer 15

Diamagnetism

Question 16

a _______ substance has a magnetic dipoles associated with each atom

Answer 16

paramagnetic

Question 17

• has magnetic moments associated with each atom
• highly magnetic since moments are aligned
  even in the absence of a magnetic field

Answer 17

ferromagnetism

Question 18

• has magnetic moments which are coupled
• moments are aligned but has parallel and antiparallel pairs

Answer 18

antiferromagnetism

Question 19

• has magnetic strength similar to ferromagnets
• highly magnetic since moments are not totally cancelled

Answer 19

Ferrimagnetism

Question 20

The atomic magnetic moments are free to rotate; hence, with (1) ________ temperature, the (2) ________ thermal motion of the atoms tends to (3) ________ the directions of any moments that may be aligned.

Answer 20

(1) rising
(2) increased
(3) randomize

Question 21

Above the Curie temperature, the moments are free to (1) ________ and (2) _______ the direction (ferro- & ferrimagnets become paramagnetic)

Answer 21

(1) rotate
(2) randomize

Question 22

Antiferromagnetic materials behave ________ at temperatures above the Neel Point

Answer 22

paramagnetically