Abeka Science Chapter 16 Flashcards Preview

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Flashcards in Abeka Science Chapter 16 Deck (32):
1

What is a glass tube containing electrodes sealed ina vacuum called?

A vacuum tube

2

What branch of the study of electricity deals with the behavior and motion of electrons in a vacuum or in special materials?

electronics

3

What did scientists call the phenomenon that occurs between electrodes in a vacuum?

cathode rays

4

What tube was designed so that the streams of electons would miss the anode and strike the end of the glass tube instead, hitting the phosphor?

cathode-ray tube

5

What is a cathode-ray tube designed to generate x-rays called?

An x-ray tube

6

Study and explain thermionic emission.

........

7

What is a simple vacuum tube consisting of two electrodes: a negatively charged filament and a positively charged plate?

A diode

8

What is the vacuum tube called that has three electodes: a wire grid in between the cathode and anode?

A triode

9

What is a device that transforms a weak signal in to a much stornger current?

An amplifier

10

What is a material called that is neither a good conductor nor a good insulator?

A semiconductor.

11

What is the process that is used to replace some of the atoms of a semiconductor with atom of another element called?

doping

12

What is the resulting material called when silicon is doped with arsenic or phosphorus?

n-type semiconductor

13

What is the resulting material called when silicon is doped with substances such as boron or gallium, making holes in the crystal lattice?

p-type

14

What is a semiconductor device that, like a vacuum-tube diode, allows current to pass in only one direction?

semiconductor diode

15

What is a semiconductor device that can perform the same funcions as a vacuum-tube triode, such as acting as a switch and amplifying weak signals?

Transistor

16

What are the three broad types of transistors?

The point-contact transistor, the junction transistor, and the field-effect transistor?

17

What is the most common type of field transistor in use tday?

The field-effect transistor.

18

What devices consist of solid crystals of semiconductor such as the semiconductor diode and transistor?

solid-state devices

19

What is a semiconductor device that produces electric current through the photovoltaic effect?

The photovoltaic cell.

20

What is a semiconductor diode that emits visible light when an electric current is applied?

A light-emitting diode.

21

What device consists of a single piece of semiconductor containing an entire electric circuit?

integrated circuit (IC)

22

What are three benefits of integrated circuits?

Integrated circuits are much cheaper to manufacture than separate components; they are much more reliable; and they are extremely small.

23

What device processes information using electonic circuits?

A computer.

24

What are computer pieces of information?

data

25

What was the first general-purpose electronic computer?

ENIAC

26

What was America's first mass-produced computer?

UNIVAC I

27

What kind of data can have any possible value within a specified range?

Analog data

28

What kind of data can have only certain values within a range?

digital

29

What do modern cumputers use to represent data?

Binary number system?

30

What is the abbreviation of binary number?

bit

31

What is the smallest recently accessible unit of data?

The byte

32

What number system is based powers of sixteen?

The hexadecimal number system