Chapter 12

Question 1

what is a device that produces static electricity

Answer 1

electrostatic generator

Question 2

what is the most common electrostatic generator

Answer 2

van de graff

Question 3

who is credited with inventing the first electrostatic generator

Answer 3

von guericke

Question 4

in a conductor, where can you always find electric charge

Answer 4

on the outside

Question 5

what is a massive surge of positive charge from the ground streaming up to a negative cloud

Answer 5

lightning

Question 6

who is credited with the invention of the lightning rod

Answer 6

Benjamin franklin

Question 7

another name for the natural electrostatic phenomenon that is corona discharge

Answer 7

st elmos fire

Question 8

the name of the device that von mussenbrooke invented that was able to store charge

Answer 8

leyden jar

Question 9

leyden jar was an early form of….

Answer 9

capacitor

Question 10

electrostatic method of reproducing images on paper

Answer 10

xyrography

Question 11

first electric light suitable for electric use

Answer 11

incandescent lamp

Question 12

type of lamp that produces light passing an electric current along a tube filled with low pressure mercury vapor and Aragon

Answer 12

fluorescent lamp

Question 13

fluorescent lamps would be reduced in size to create

Answer 13

CFL

Question 14

type of lamp that is filled with neon gas

Answer 14

neon lamp

Question 15

semiconductor device that emits light when direct current is applied to it

Answer 15

LED

Question 15

simple electromagnetic device converting electricity to back and forth motion

Answer 15

solenoid

Question 16

what consist of an electromagnetic key that is capable of comm messages

Answer 16

telegraph

Question 17

device that is considered to be an electromagnetic switch

Answer 17

relay

Question 18

device that converts pulses of electricity into sound waves

Answer 18

loudspeaker

Question 19

device that uses electricity to produce motion

Answer 19

motor

Question 20

device using motion to produce electricity

Answer 20

generator

Question 21

a permanent magnet used to produce a stationary magnetic field

Answer 21

field magnet

Question 22

true or false : changing the direction of current in the armature each quaternary turn causes it to turn continually

Answer 22

false - its every half turn

Question 23

which type of motor uses a slip ring

Answer 23

AC motor

Question 24

what is an electrochemical cell used to produce electricity

Answer 24

voltaic cell

Question 25

a voltaic cell that is capable of being recharged

Answer 25

storage cell

Question 26

in a battery, which electrode is the negative electrode

Answer 26

anode

Question 27

if we take two or more voltaic cells and connect them together, what is formed

Answer 27

a battery

Question 28

if I want to increase the voltage of batteries connected together, how would you arrange them

Answer 28

in a series

Question 29

if batteries are arranged in parallel, what will be increased

Answer 29

current

Question 30

ability of magnetism to convert mechanical motion into electric current

Answer 30

electromagnetic induction

Question 31

name the ways to increase the current in an electromagnet

Answer 31

1. increase the number of coils 2. 3.

Question 32

what do we call the portion of a motor that spins as its placed inside the field magnet area

Answer 32

armature

Question 33

type of generator that produces electricity by moving a conducting fluid through the magnetic field very quickly

Answer 33

MHD generator

Question 34

another source of power generation

Answer 34

1. solar 2. wind 3. nuclear fission 4. nuclear fusion

Question 35

device that is capable of increasing or decreasing the voltage along a conductor

Answer 35

transformer

Question 36

branch of science that studies electricity and the behavior and motions electrons inside a vacuum or semiconductor

Answer 36

electronics

Question 37

true or false - electricity can travel through a vacuum without a conductor

Answer 37

true

Question 38

what is a glass tube containing electrodes sealed in a vacuum

Answer 38

vacuum tube

Question 39

in a vacuum tube, which electrode is the negative electrode

Answer 39

cathode

Question 40

which vacuum tube is capable of one allowing electricity to go in one direction

Answer 40

diode

Question 41

of the vacuum tubes, which one is a production of electric current by using a heated cathode that produces a cloud of heated electrons

Answer 41

thermionic emission

Question 42

which vacuum tube was invented by wilhelm roentgen

Answer 42

x-ray tube

Question 43

which vacuum tube had the anode removed from the main area so that the cathode rays would hit the other end

Answer 43

cathode end tube

Question 44

type of vacuum tube that has a third electrode

Answer 44

triode

Question 45

a material that is not a good conductor or insulator

Answer 45

semiconductor

Question 46

process by which we can add a material to a semiconductor which will increase or decrease the number of available electrons

Answer 46

doping

Question 47

what are the two main component s of a semiconducting diode

Answer 47

1. n type - more electrons 2. p type - less electrons

Question 48

semiconducting triode

Answer 48

transistor

Question 49

the most common type of transistor used today

Answer 49

field effect transistor

Question 50

we usually call semiconductor diodes and transistors these type of devices that consist of the solid crystals of semiconductors

Answer 50

solid state devices

Question 51

p-type semiconductor with a thin layer of n-type o top of it in order to produce electricity when light strikes it

Answer 51

photovoltaic cell

Question 52

device that consists of a single piece of a semiconductor containing an entire electronic circuit (the 3 different names)

Answer 52

integrated circuit chip IC

Question 53

name the advantages of why an IC is better than a diode or a transistor

Answer 53

1. smaller 2. 3.

Question 54

device that processes info using electronic circuits

Answer 54

computer

Question 55

piece of info

Answer 55

data

Question 56

computer that was the first mass produced

Answer 56

UNIVAC 1

Question 57

type of data that can have any possible value within a specific range

Answer 57

analog data

Question 58

what do we call random variations that affect data

Answer 58

noise

Question 59

practically all modern electronic computers are

Answer 59

digital computers

Question 60

modern digital computers represent data using this system

Answer 60

binary system

Question 61

what is the smallest individual binary digit

Answer 61

bit

Question 62

how many bits in a byte

Answer 62

8

Question 63

what is the smallest directly accessible amount of data

Answer 63

byte

Question 64

a numbering system with base 16

Answer 64

hexidecimal system

Question 65

each number and character in a computer is most commonly represented by this form of coding language

Answer 65

asky coding

Question 66

a device that produces a single binary output based upon multiple binary inputs

Answer 66

logic gates

Question 67

a single chip contains the CPU

Answer 67

microprocessor

Question 67

the physical components of a computer

Answer 67

hardware

Question 68

the brain of the computer

Answer 68

CPU

Question 69

a collection of programs that contain instructions for displaying words and images on a screen

Answer 69

operating system

Question 69

second most important component of a computer

Answer 69

memory

Question 70

a computer uses this language instead of binary sequences to understand the operation of that program

Answer 70

machine language

Question 71

largest computer network in the world

Answer 71

internet

Question 72

what is a relatively small inexpensive computer designed for one user at a time

Answer 72

PC