Abeka Science Chapter 13 Flashcards Preview

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Flashcards in Abeka Science Chapter 13 Deck (41):
1

What is the study of nature, behavior, and uses of static electricity and related phenomena?

Electrostatics

2

What Greek philosopher, mathematician, and astronomer observed that a piece of amber, when rubbed with wool, attracts straw?

Thales of Miletus

3

What 18th century scientist discovered that static electricity exists in two forms- positive and negative?

Benjamin Franklin

4

What property allows protons and electrons to attract and repel other charged particles by the electromagnetic force?

Electric charge

5

What is the interactions between electrons and other charged particles?

Electricity

6

What is the simplest form of electricity?

Static electricity

7

True or False: Equal and opposite charges neutralize each other when they come into contact.

True

8

What is the region around a charged object in which other objects are attracted or repelled by an electric force?

An electric field

9

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

Lines of force

10

What is the SI unit of electric charge?

The coulomb

11

What the law states that opposite charges attract each other, but like charges repel each other?

The law of electric charges

12

What does a uniform field mean?

The strength of the field is equal throughout.

13

What scientist, after whom the SI unit of charge is named, established certain behaviors of static electricity which are recorded in the law of electric force?

Charles de Coulomb

14

What law states that the strength of the attraction or reulsion between two charged ojects is directly related to the strength of the charges and inversely related to the square of the distance between them?

The law of electric force

15

What is it called when electric charge is transferred by direct contact?

conduction

16

True or False:
A charge imparted by conduction has the opposite sign (positive or negative) than the original sign.

False;
The charge has the same sign

17

Is charging by conduction permanent?

Yes

18

What law describes another property of charging by conduction? It states that the total charge is the same before and after an interaction.

The law of conservation of charge

19

What is the process of diverting unwanted electric charge directly into the earth called?

grounding

20

How can electric charge be imparted at a distance without the objects touching?

Through induction

21

How many charges does induction produce?

Two

22

What is the similarity between charging by induction and charging by convection?

They both obey the law of conservation of charge.

23

Is charging by induction usually permanent?

No, it's normally temporary.

24

How can a permanent charge be produced by induction?

If induction and grounding are combined, a permanent charge can be produced.

25

What is the flow of charge from one place to another?

current

26

What solutions readily conduct electricity?

Electrolytic solutions

27

What is a simple device that uses the laws of electrostatics to detect small electric charges?

An electroscope

28

What did William Gilbert call his electroscope?

A versorium

29

Who built the first electrostatic generator?

Otto van Guericke

30

What device produces static electricity?

An electrostatic generator

31

What machine, built by James Wimshurst, used two rotating disks to increase a charge through induction?

The Wimshurst machine

32

What electrostatic generator is the most common in use today? It was invented by Robert J. Van De Graaf.

The Van de Graaf machine

33

Where does the electric charge move on an object?

The electric charge always moves to the oustide of an object.

34

What is the initial stream of electrons called that moves from the cloud to the ground?

A stepped leader

35

What is it called when the positive charge on the ground launches upward to met a stepped leader?

A positive streamer

36

What is the upward flow of positive charge that results from the meeting of the positive streamer and stepped leader?

The return stroke

37

After the flash of light occurs from the return stroke, what can occur if enough charge is available?

A dart leader

38

What device did Franklin invent that protects buildings and other structures from lightning strikes?

Lightning rod

39

What device did Musschenbroek invent that could collect an electric charge and store it?

The Leyden Jar

40

What is a device used to store a static electric charge?

A capacitator

41

What is an electrostatic method of reproducing images on paper?

Xerography