Chapter 10.1

Question 1

During ancient times, what served as a natural compass that consistently pointed north?

Answer 1

Lodestone

Question 2

What is an object capable of attracting materials such as iron or steel by magnetic force?

Answer 2

Magnet

Question 3

What are regions of concentrated magnetism?

Answer 3

Poles

Question 4

What are imaginary lines that indicate the direction and strength of the magnetic field?

Answer 4

Lines of flux

Question 5

What states that the force between two magnetic poles is directly related to the product of the pole strengths and inversely related to the square of the distance between the poles?

Answer 5

Law of magnetic force

Question 6

What is the mathematical statement of the law of magnetic force?

Answer 6

F=K(first pole strength x second pole strength / square of distance between poles)

(See p. 238 for formula)

Question 7

What is the extent to which a material can absorb or channel lines of magnetic flux?

Answer 7

Permeability

Question 8

Why are permeable materials good magnetic shields?

Answer 8

Because lines of magnetic flux become trapped inside the shield, which protects objects outside the box from experiencing very little magnetic attraction.