Delmar's Unit 4

Question 1

What are natural magnets called?

Answer 1

lodestones

Question 2

Where is magnetic north located?

Answer 2

Near the south pole

Question 3

What is a permanent magnet?

Answer 3

Magnets that do not require any power or force to maintain their field

Question 4

What happens when a permanent magnet is cut into pieces?

Answer 4

Each piece becomes its own magnet

Question 5

Define ferromagnetic

Answer 5

Metals that are easily magnetized

Question 6

Define paramagnetic

Answer 6

Metals that can be magnetized.

Question 7

Define Diamagnetic

Answer 7

Metals or nonmetals that cannot be magnetized

Question 8

What are some examples of ferromagnetic materials

Answer 8

Iron, nickel, cobalt, and manganese.

Question 9

What are some examples of paramagnetic materials?

Answer 9

Platinum, titanium, and chromium.

Question 10

What are some examples of diamagnetic materials?

Answer 10

Copper, brass, and antimony.

Question 11

What is flux?

Answer 11

Magnetic lines of force

Question 12

What is an electromagnet?

Answer 12

When an electric current flows through a conductor, a magnetic field is formed around the conductor.

Question 13

How do you determine the strength of an electromagnet?

Answer 13

Multiply number of turns of wire by the the current flow.

Question 14

What is the measure of electromagnet strength

Answer 14

Ampere-turns

Question 15

What is the term for the ability of a material to be magnetized?

Answer 15

Permeability

Question 16

What is the term for a materials resistance to magnetism?

Answer 16

Reluctance