Abeka 9th grade Science (Matter and Energy) Test 9 (quarter exam)

UNIVACI

America's first mass - produced computer was

soft

Substances that can be easily magnetized are considered magnetically

electronics

The branch of the study of electricity that deals with the behavior and motion of electrons in a vacuum or in semiconductors is ? ___

field effect transistor

The most common type of transistor used today is the

input / output device

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

data

What are pieces of information stored in computers called ?

hardware

What are the actual physical components of a computer called ?

lines of flux

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

telegraph

What communication device uses electromagnets to reproduce messages by means of audible clicks ?

battery

What device consists of one or more electrochemical cells connected in series to produce a single source of current ?

photovoltaic cell

What device converts absorbed sunlight directly into electricity ?

microprocessor

What is a single chip that contains a complete CPU ?

personal computer

What is a small , relatively inexpensive computer designed for use by one user at a time ?

uniform field

What is an electric field with even strength throughout ?

resistor

electrical device designed to add resistance to a circuit

computer

electronic device that processes information using electrical circuits

transformer

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

logic gate

produces a single binary output based on one or more binary inputs

electromagnet

produces a strong magnetic field when electricity passes through it

transistof

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

solenoid

simple device that converts electricity to come back - and forth motion

fuse

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

generator

uses electromagnetic induction to produce electricity

Electrical energy is converted into wave energy

A lithotripsy machine is a medical device that uses high - frequency sound waves to break up kidney stones , solid objects that may form in the kidneys . The sound waves break the stones into smaller pieces that are naturally removed from the body . Where does the energy to break up the kidney stones come from ?

p - type

A semiconductor that lacks electrons is an ___?___ semiconductor .

triode

A simple vacuum tube consisting of three electrodes is a ( n ) ___ ? ___ .

The leaves will remain separated

Austin used an uncharged electroscope to demonstrate that like charges repel by induction . As he moved a negatively charged rod toward the knob of the electroscope , the leaves separated . How would touching the knob with the rod affect the leaves of the electroscope ?

The lights form a parallel circuit , and the new bulb made a closed circuit

Christmas lights . He tested the Armando decided to decorate his bedroom with a strand of strand of lights and found that one of the bulbs was burnt out , but all of the other bulbs were lit. He replaced the burnt out bulb with a new bulb , and it lit up . What is the scientific explanation for this situation ?

The fifth digit should be 0 .

Jayden lives at 24 Woodhill Drive . He converted the number of his home address into binary by hand and came up with 11001. He then entered this value into a computer program . According to the program , this number is decimal 25. What is wrong with the value he entered ?

mainframes

Large computers designed to store and retrieve vast amounts of information are

conduction

What is the transfer of an electric charge by direct contact between objects ?

central processing unit

What part of a computer controls all other systems of the computer ?

thermionic emission

What process produces an electric current in a vacuum using a heated cathode ?

RAM

What type of computer memory is used for temporary storage ?

magnetohydrodynamic generator

What type of generator works by passing a conducting fluid through a magnetic field ?

Otto von Guericke

Who built the first electrostatic generator

magnetizing by contact

What is the method of magnetism in which an object is permanently magnetized by stroking a magnet against the object ?

3 , 1 , 2,4

What is the order of road signs from least to greatest electric charge concentration ?

byte

What is the smallest directly accessible unit of data in a computer ?

hexadecimal

The number system that is based on powers of sixteen is the ___?___ system

cathode

The positive terminal of a voltaic or storage cell contacts the cell's

doping

The process of replacing atoms of a semiconductor with atoms of another element is called ?

current

The rate of charge flow is called ?

software

The stored information and set of instructions that direct a computer to perform certain tasks is the ?

analog

The type of data that can have any possible value within a specified range is called ___?___ data

voltaic cell

The type of electrochemical cell that is not designed to be recharged is the

loudspeaker

What device converts pulses of electricity into sound waves ?

The magnets have unlike poles near each other

What do the lines of flux demonstrate in the image below ?

Leyden jar

What early device was developed to store electric charge ?

operating system

What is a collection of programs that contain instructions for displaying words and images on the screen for a user ?

supercomputer

What is a large , extremely powerful computer designed for rapidly performing complex calculations ?

superconductor

What is a material that allows current to flow through it with no resistance ?

light - emitting diode

What is a semiconductor device that produces light when a direct current is applied ?

relay

What is an electrical switch operated by an electromagnet called ?

coulomb

What is the SI unit of electric charge ?

ohm

What is the SI unit of resistance ?

xerography

What is the electrostatic method of reproducing images on paper ?

25 times the original force

What is the final attraction force between two charged objects when the distance is reduced to % of the original distance ?

load

What is the general term for a device that transforms the energy of an electric current into another useful form of energy ?

magnetic equator

What is the imaginary line that circles Earth halfway between the two magnetic poles ?

internet

What is the largest computer network ?

agonic line

What is the line connecting all points where a compass needle points true north ?