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PHY S 100 BYU > Chapter 4 > Flashcards

Chapter 4 Flashcards

1
Q

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.

A

Electric Force Law

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2
Q

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

A

Electric force constant

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3
Q

The basic negative charge-carrying particle in an atom.

A

Electron

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4
Q

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

A

J. J. Thomson

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5
Q

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

A

Benjamin Franklin

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6
Q

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

A

Augustin de Coulomb

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7
Q

Developed a way to measure the charge of individual electrons.

A

Robert Millikan

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8
Q

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.

A

Coulomb

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9
Q

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

A

Proton

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10
Q

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

A

Neutron

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11
Q

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

A

Insulator

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12
Q

A material that allows electrons to flow through it.

A

Conductor

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13
Q

Electric charges flowing through a conductor.

A

Electric current

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14
Q

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

A

Direct current

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15
Q

A current of electrons that changes direction of flow.

A

Alternating current

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16
Q

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

A

Ferromagnetism

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17
Q

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

A

Field

18
Q

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

A

Domain

19
Q

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

A

Curie Temperature

20
Q

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

A

Field lines

21
Q

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

A

Contact Force

22
Q

Friction comes from electromagnetic forces.

A

true

23
Q

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

A

false

24
Q

Neutrons have a negative charge.

A

false

25
Q

Iron and nickel are examples of ferromagnetic metals.

A

true

26
Q

Electric currents exert forces on permanent magnets.

A

true

27
Q

The basic positive charge-carrying particle in an atom.

A

proton

28
Q

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

A

ferromagnetic

29
Q

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

A

insultator

30
Q

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.

A

the Electric Force Law

31
Q

A current of electrons that changes direction of flow.

A

alternating current

32
Q

The unit of measure for charge.

A

Coulumb

33
Q

Material that allows electrons to flow through it.

A

conductor

34
Q

The basic negative charge-carrying particle in an atom.

A

electron

35
Q

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

A

direct current

36
Q

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

A

contact force

37
Q

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

A

electric force constant

38
Q

A neutral particle found in the nuclei of atoms.

A

neutron

39
Q

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

A

electrons are transferred from glass to rubber.

40
Q

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

A

Henry Cavendish

41
Q

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

A

Double the charge on one of the objects.

PHY S 100 BYU (12 decks)

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