Isabella's ch.9-12. Sci.test

Question 1

Transfer of an electric charge by direct contact between objects

Answer 1

Conduction

Question 2

who built the first electrostatic generator

Answer 2

Otto von guericke

Question 3

SI unit of resistance

Answer 3

Ohm

Question 4

Material that allows current to flow through it with no resistance

Answer 4

Superconductor

Question 5

Communication device that uses electromagnetics to produce a message by means of audible clicks

Answer 5

Telegraph

Question 6

Device that converts posts of electricity into sound waves

Answer 6

Loudspeaker

Question 7

Device that consists of one or more electrochemical cells connected in series to produce a single source of current

Answer 7

Battery

Question 8

General term for a device that transfers the energy of an electric current into another useful energy

Answer 8

Load

Question 9

Early device developed the store electric charge

Answer 9

Leyden jar

Question 10

Device that converts absorbed sunlight directly into electricity

Answer 10

Photovoltaic cell

Question 11

Type of generator that works by passing a conducting fluid through a magnetic field

Answer 11

Magnetic hydrodynamic generator

Question 12

Electric field with even strength throughout

Answer 12

Uniform field

Question 13

Method of magnetism in which an object is permanently magnetized by stroking a magnet against the object

Answer 13

Magnetizing by contact

Question 14

A semiconductor device that produces light when a direct current is applied

Answer 14

(LED) light emitting diode

Question 15

The line connecting all points where the compass needle points true North

Answer 15

Agonic line

Question 16

Imaginary line that circles Earth halfway between the two magnetic poles

Answer 16

Magnetic equator

Question 17

Final attraction Force between two charged objects when the distance is reduced by 1/5 of the original distance

Answer 17

25 times the original Force

Question 18

Small relatively inexpensive computer design for use by one user at a time

Answer 18

(PC) personal computer

Question 19

A large, extremely powerful computer design for rapidly performing complex calculations

Answer 19

Supercomputer

Question 20

What allows a computer to communicate with the outside world or a user to communicate with the computer

Answer 20

Input/output device

Question 21

What is the largest computer network

Answer 21

Internet

Question 22

A single chip that contains a complete CPU

Answer 22

Microprocessor

Question 23

Type of computer memory that is used for temporary storage

Answer 23

RAM

Question 24

SI unit of electric charge

Answer 24

Coulomb

Question 25

what are the actual physical components of a computer called

Answer 25

Hardware

Question 26

Smallest directly accessible unit of data in a computer

Answer 26

Byte

Question 27

Electronic device that produces information using electrical circuits

Answer 27

Computer

Question 28

Processes a single binary output based on one or more binary input

Answer 28

Logic gates

Question 29

What uses a narrow strip of metal in a protective insulated case to limit current through a circuit

Answer 29

Fuse

Question 30

Electrical devices designed to add resistance to a circuit

Answer 30

Resistor

Question 31

What uses electromagnetic induction to produce electricity

Answer 31

Generator

Question 32

What produces a strong magnetic field when electricity passes through it

Answer 32

Electromagnet

Question 33

Simple device that converts electricity to back and forth motion

Answer 33

Solenoid

Question 34

Semiconductor device that can perform same functions a vacuum tube triode such as acting as a switch and amplifying weak signals

Answer 34

Transistor

Question 35

Increases or decreases the voltage of an alternating current using electromagnetic induction

Answer 35

Transformer

Question 36

Pieces of information stored in computers are called

Answer 36

Data

Question 37

An electrical switch operated by an electromagnetic is called

Answer 37

Relay

Question 38

Process that reduces an electric current in a vacuum using heated cathode

Answer 38

Thermionic emission

Question 39

Imaginary lines that indicate the direction and strength of a magnetic field

Answer 39

Lines of flux

Question 40

Electrostatic method of reproducing images on paper

Answer 40

Xerography (xerox)

Question 41

Stored information and set of instructions that direct a computer to perform certain tasks

Answer 41

Software

Question 42

Simple vacuum tube consisting of three electroids is a

Answer 42

Triode

Question 43

Process of replacing atoms of a semiconductor with atoms of another element

Answer 43

Doping

Question 44

Branch of the study of electricity that deals with the behavior and motion of electrons in a vacuum or a semiconductor

Answer 44

Electronics

Question 45

What is the rate of charge flow

Answer 45

Current

Question 46

Mod. t/f- type of data that can have any possible value within a specified range is DIGITAL data

Answer 46

False- ANALOG

Question 47

Mod. T/f- number system that is based on Powers of 16 is the BINARY number system

Answer 47

False- HEXADECIMAL SYSTEM

Question 48

Mod. t/f- semiconductor that lacks electrons is an N-TYPE semiconductor

Answer 48

False- P-TYPE

Question 49

Mod. t/f- Americans first mass produced computer is the ENIAC

Answer 49

False-UNIVAC

Question 50

Mod. t/f- substance that can be easily magnetized are considered magnetically HARD

Answer 50

False-SOFT

Question 51

Mod. t/f- most common type of transistor used today is the FIELD EFFECT transistor

Answer 51

TRUE

Question 52

Mod. t/f-Type of electrochemical cell that is not designed to be recharged is the VOLTAIC cell

Answer 52

TRUE

Question 53

Mod. t/f- positive terminal of the voltaic or storage cell contacts the cell's CATHODE

Answer 53

TRUE

Question 54

Mod. t/f- large components designed to restore and retrieve vast amounts of information are MAINFRAMEcomputers

Answer 54

TRUE