Chapter 4

Question 1

The mathematical formula F=kqQ/d2 that describes the strength of the force between two objects of charge Q and q separated between their centers by the distance d.

Answer 1

Electric Force Law

Question 2

A number relating the strength of the electric force to the charges involved and their distance apart.

Answer 2

Electric force constant

Question 3

The basic negative charge-carrying particle in an atom.

Answer 3

Electron

Question 4

Used a gas discharge tube to determine that electricity had mass.

Answer 4

J. J. Thomson

Question 5

Was not only renowned as a statesman, but he was also an accomplished scientist..

Answer 5

Benjamin Franklin

Question 6

Discovered that forces between charged bodies are proportional to the charges on them, and inversely proportional to the square of their distance.

Answer 6

Augustin de Coulomb

Question 7

Developed a way to measure the charge of individual electrons.

Answer 7

Robert Millikan

Question 8

The unit of measure for charge: it is named after Charles Augustin de Coulomb, formulator of the Electric charge possessed by a single election or a proton is 1.6 x 10-19 coulombs.

Answer 8

Coulomb

Question 9

A positively charged particle in atomic nuclei made up of three quarks.

Answer 9

Proton

Question 10

An unchanged particle in atomic nuclei made up of three quarks.

Answer 10

Neutron

Question 11

A material that does not permit electrons to flow through it.

Answer 11

Insulator

Question 12

A material that allows electrons to flow through it.

Answer 12

Conductor

Question 13

Electric charges flowing through a conductor.

Answer 13

Electric current

Question 14

A steady flow of electrons in one direction, typically through a wire.

Answer 14

Direct current

Question 15

A current of electrons that changes direction of flow.

Answer 15

Alternating current

Question 16

Metal alloys that are attracted to magnets or are capable of being transformed into permanent magnets are called ferromagnetic.

Answer 16

Ferromagnetism

Question 17

Physical quantity existing at every point in space. Some fields arise from sources and may be thought of as the “influence” of these sources.

Answer 17

Field

Question 18

A small section in a magnet where the magnetic force from all the atoms add together.

Answer 18

Domain

Question 19

The temperature above which a metal is no longer magnetized. The Curie temperature is unique for different types of metals.

Answer 19

Curie Temperature

Question 20

Lines coming from an object representing the strength of the force. The denser the lines, the stronger the force.

Answer 20

Field lines

Question 21

The force arising between objects when they touch. Contact forces are a repulsion caused by the electromagnetic interaction.

Answer 21

Contact Force

Question 22

Friction comes from electromagnetic forces.

Answer 22

true

Question 23

Electric force becomes stronger if the charged objects are moved farther apart.

Answer 23

false

Question 24

Neutrons have a negative charge.

Answer 24

false

Question 25

Iron and nickel are examples of ferromagnetic metals.

Answer 25

true

Question 26

Electric currents exert forces on permanent magnets.

Answer 26

true

Question 27

The basic positive charge-carrying particle in an atom.

Answer 27

proton

Question 28

Metal alloys that are attracted to magnets or are capable of being transformed into a permanent magnet.

Answer 28

ferromagnetic

Question 29

A materiel that does not permit electrons to flow through it.

Answer 29

insultator

Question 30

The matematical formula F=kqQ/d2 which describes the strength of the force between two objects of charge Q and q with their centers separated by the distance d.

Answer 30

the Electric Force Law

Question 31

A current of electrons that changes direction of flow.

Answer 31

alternating current

Question 32

The unit of measure for charge.

Answer 32

Coulumb

Question 33

Material that allows electrons to flow through it.

Answer 33

conductor

Question 34

The basic negative charge-carrying particle in an atom.

Answer 34

electron

Question 35

A steady flow of electrons in one direction through a wire.

Answer 35

direct current

Question 36

A repulsive force between electrons near the surface of two different objects.

Answer 36

contact force

Question 37

A number relating the strength of the electric force to the charges involved and their distance apart.

Answer 37

electric force constant

Question 38

A neutral particle found in the nuclei of atoms.

Answer 38

neutron

Question 39

When a glass rod is rubbed with rubber, it becomes positively charged. This is because

Answer 39

electrons are transferred from glass to rubber.

Question 40

Who among the following did not contribute discoveries about electromagnetic interactions?

Answer 40

Henry Cavendish

Question 41

Suppose you wanted to exactly double the electric force between two objects. How could you accomplish that?

Answer 41

Double the charge on one of the objects.