Introduction To Physical Science

Chapter 22: Electronics and Computers

Electronics and Computers

1
A number that is expressed using only the digits 0 and 1 is called __________.
A)binumeric
B)a binary number
C)a base ten number
D)a prime number
2
A changing electric current that carries information is a(n) __________.
A)magnetic tape
B)alternating current
C)direct current
D)electronic signal
3
Early televisions and radios were larger than their modern versions because they used __________.
A)silicon
B)semiconductors
C)transistors
D)vacuum tubes
4
Which of the following statements about analog signals is true?
A)Analog signals cannot be used to record music.
B)Analog signals can have only certain values.
C)Analog signals cannot be converted to digital signals.
D)Analog signals vary smoothly with time.
5
Which of the following base two numbers is equal to the base ten number 13?
A)310
B)1101
C)1110
D)221
6
Which of the following elements is a semiconductor?
A)selenium
B)strontium
C)silicon
D)sodium
7
If the base ten number 15 is written 1111 in the binary system, how would it be written in base 5?
A)30
B)111
C)11
D)10
8
An analog signal is created by __________.
A)an analog device
B)digitization
C)a computer
D)a binary number series
9
Which of the following statements about computer information storage is correct?
A)Information stored on a hard disk can only be read and not changed.
B)Information stored in ROM is lost when the computer is turned off.
C)Information on a hard disk is stored with electronic switches.
D)Information on a hard disk is stored magnetically.
10
Which of the following is a type of electronic signal?
A)diode
B)integrated
C)analog
D)binary
11
Which of the following storage methods is used for information that can be read only and not changed?
A)floppy disk
B)RAM
C)hard disk
D)ROM
12
Information stored in computers must be converted to a(n) __________.
A)hardware component
B)program
C)analog signal
D)digital signal
13
A(n) __________ is a device that contains three layers of semiconductors and can be used as an electronic switch.
A)binary
B)transistor
C)diode
D)analog
14
An electric current is a flow of __________ from one place to another.
A)atoms
B)protons
C)neutrons
D)electrons
15
A(n) __________ is a semiconductor device that allows current to flow in only one direction.
A)transistor
B)chip
C)integrated circuit
D)diode
16
Which of the following is NOT computer hardware?
A)microprocessor
B)word processing program
C)hard disk drive
D)keyboard
17
Which of the following is NOT a computer language?
A)Compiler
B)Basic
C)Java
D)C++
18
The electrical conductivity of semiconductor elements can be changed by adding __________.
A)analogs
B)digital signals
C)impurities
D)diodes
19
Which of the following is NOT a solid-state component?
A)integrated circuit
B)vacuum tube
C)transistor
D)diode
20
A(n) __________ is a series of instructions that tell the computer how to do a job.
A)integrated circuit
B)CPU
C)program
D)hard disk
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