Magnetism

Question 1

Consists of
wire wrapped around an iron
core.

Answer 1

Electromagnets

Question 2

Materials
that are unaffected by
magnetic field.

Answer 2

Nonmagnetic

Question 3

Materials that are
weakly repelled by magnetic
fields.

Answer 3

Diamagnetic

Question 4

They cannot be artificially
magnetized, and they are not
attracted to a magnet.
•Ex. Copper, beryllium, lead

Answer 4

Diamagnetic

Question 5

They are slightly attracted to a
magnet and loosely influence by
an external magnetic field.
• Ex. Gadolinium -contrast agents
used in MRI, platinum,
aluminum
Types of M

Answer 5

Paramagnetic

Question 6

Materials that lie
somewhere between
ferromagnetic and nonmagnetic.

Answer 6

Paramagnetic

Question 7

fundamental property of some forms of matter

Answer 7

magnetism

Question 8

A charge particle in motion also creates ?

Answer 8

magnetic field

Question 9

• In radiologic sciences, understanding magnetism is important in
____which uses powerful magnetic fields to
create images of the human body.

Answer 9

magnetic resonance imaging

Question 10

is a vector field
that describes the magnetic influence of electrical currents
and magnetized materials.

Answer 10

magnetic field

Question 11

The motion of____
and their spins, in opposite direction, produce tiny magnetic fields.

Answer 11

orbital electrons

Question 12

Magnetic field is also created by a ?

Answer 12

moving electric charge

Question 13

Magnetic field (B) is measured jn

Answer 13

Gauss (G)

Question 14

Magnetic field is ____ (magnetic dipole)

Answer 14

dipolar (has north and south pole)

Question 15

are regions at the end of the magnet where the magnetic field are strongest

Answer 15

poles

Question 16

Law of Magnetism

Answer 16

Like magnetic poles repel and unlike magnetic poles attract.

Question 17

is a region
created by the accumulation of
many atomic magnets with their
dipoles aligned.

Answer 17

magnetic domain

Question 18

Magnetic domain -This means that the individual
magnetic moments of the atoms
are aligned with one another,
and they point in the ___.

Answer 18

same
direction

Question 19

Magnetic force is caused by ?

Answer 19

motion of charges

Question 20

is the consequence of the electromagnetic force

Answer 20

magnetic force

Question 21

Two objects containing charge with the same direction of motion have
a _____ force between them.

• Similarly, objects with charge moving in opposite directions have a ___force between them

Answer 21

magnetic attraction; repulsive

Question 22

As moving charges create magnetic fields, so they
experience forces from magnetic fields generated by other materials. The magnitude of the force experienced by a particle traveling in a magnetic field depends on the charge of the particle (q), the velocity of the particle(v), the strength of the field(B), and, importantly, the angle between their relative directions(θ):

Answer 22

Lorentz Force

Question 23

____ (q); _____(B)

Answer 23

charge;magnetic field

Question 24

unit of magnetic field strength

Answer 24

Tesla

Question 25

Types of magnets (7)

Answer 25

1. Natural magnets 2. Permanent magnets 3. Electromagnets 4. Nonmagnetic 5. Diamagnetic 6. Paramagnetic 7. Ferromagnetic

Question 26

Example is the Earth. _____ has been exposed to Earth’s magnetic field for a long time and has developed a strong magnetism.

Answer 26

natural magnets;Lodestone

Question 27

Usually made of iron. Made by aligning their domains in the field of an electromagnet.

Answer 27

Permanent magnets

Question 28

Materials that lie somewhere between ferromagnetic and nonmagnetic.

Answer 28

Paramagnetic

Question 29

contrast agents used in MRI,

Answer 29

gadolinium example of paramagnetic

Question 30

Strongly attracted to magnets or magnetic materials and usually can be permanently magnetized by exposure to a magnetic field. Ex. Alnico –combination of aluminum, nickel, cobalt

Answer 30

Ferromagnetic

Question 31

–combination of aluminum, nickel, cobalt

Answer 31

Alnico example of ferromagnetic