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X-Ray 111 > Electrostatics > Flashcards

Electrostatics Flashcards

1
Q

What is Electrostatics?

A

The study of stationary electric charges

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2
Q

Electric charges are measured in

A

Coulomb

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3
Q

Atoms that are fixed inside the nucleus

A

Protons

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4
Q

Atoms that are free to move outside the nucleus

A

Electrons

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5
Q

If electrons are removed, how is the atom charged?

A

Positive

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6
Q

If electrons are added, how is the atom charged?

A

Negative

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7
Q

Which shells are more tightly bound?

A

Inner shells

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8
Q

The process of removing or adding electrons

A

Electrification

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9
Q

Does not allow the free flow of electrons

A

Nonconductor/Insulator

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10
Q

Allow the free flow of electrons

A

Conductors

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11
Q

Between a nonconductor and a conductor

A

Semiconductor

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12
Q

No resistance to electron flow - must be very cold

A

Superconductor

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13
Q

1st law of Electrostatics

A

Like charges repel, unlike charges attract

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14
Q

The region surrounding every charged body in which a force is exerted on another charged body

A

Electric Field

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15
Q

2nd law of Electrostatics

A

Stronger when closer, Weaker with more distance

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16
Q

3rd law of Electrostatics

A

Electric charges reside only on the external surface

17
Q

4th law of Electrostatics

A

The concentration of charges on a curved surface is greatest at the curvature

18
Q

5th law of Electrostatics

A

Only negative charges can move

19
Q

3 methods of Electrification

A

Friction, Induction, Contact

20
Q

Removal of electrons from one object by rubbing it with another object

A

Friction

21
Q

When two objects touch, permits electrons to move from one body to another

A

Contact

22
Q

Electrical fields acting in one another without contact

A

Induction

23
Q

Electric Ground

A

Earth

24
Q

What is the principle reservoir for excess electric charge?

A

Earth

25
Q

Regarding the movement of an electric charge from one atom to another

A

Usually outer shell electrons move

26
Q

What is concerned with resting electric charges?

A

Electrostatics

27
Q

Coulombs law states that electrostatic force is inversely proportionate to

A

the square of the distance between charges

28
Q

What are the three methods of electrification?

A

Friction, Contact, Induction

29
Q

The unit of electrostatic charge is

A

Coulomb

30
Q

The principal electrostatic law states that

A

An electron will repel and electron

31
Q

Objects becomes electrified because of the transfer of

A

electrons

32
Q

Lightning occurs when

A

One cloud is positively charged and the adjacent one is negative

X-Ray 111 (5 decks)

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