Chapter 19 Test - Craig Fisher | Laabri | Nneɛma a ɛma wotumi yɛ ade

MULTIPLE CHOICE

-Choose the correct answer by clicking on your answer choice. Only one answer is correct. (2 pts. each)

2

A CPU does everything EXCEPT

A. send information through telephone lines.

B. do calculations.

C. solve problems.

D. execute instructions.

2

The task of converting AC to DC is performed by

A. transistors.

B. diodes.

C. signals.

D. amplifiers.

2

Which of the following statements about vacuum tubes is true?

A. They last longer than transistors or diodes.

B. They take up less space than integrated circuits.

C. They make communication devices work faster.

D. They amplify electric current and change AC to DC.

2

Which of the following statements about semiconductors is NOT true?

A. They conduct electric current better than insulators do.

B. They have slowed the pace of technology.

C. They do not conduct electric current as well as conductors do.

D. They are the backbone of most electronic devices.

2

Which of the following statements about integrated circuits is true?

A. They contain one transistor and many silicon chips.

B. They make devices operate at very slow speeds.

C. They have helped reduce the size of electronic devices.

D. They require electric charges to travel long distances.

2

When you push a button on a remote control, you are sending a signal to a

A. vacuum tube.

B. semiconductor.

C. television antenna.

D. circuit board.

2

The central processing unit in a computer is NOT responsible for

A. memorizing data.

B. doing calculations.

C. solving problems.

D. executing instructions.

2

Which of the following statements about semiconductors is NOT true?

A. They conduct electric current better than insulators do.

B. They only use silicon.

C. They do not conduct electric current as well as conductors do.

D. They are the backbone of most electronic devices.

2

A vacuum tube will

A. improve the quality of a plasma display.

B. take up less space than an integrated circuit.

C. make communication devices work faster.

D. amplify electric current.

2

Which of the following can convert alternating current to direct current?

A. transistor

B. diode

C. integrated circuit

D. amplifier

2

Integrated circuits

A. consist of one transistor and many silicon chips.

B. can amplify sound waves.

C. can make devices operate quickly.

D. require electric charges to travel long distances.

2

What does a circuit board do?

A. connects electronic devices

B. receives signals from a TV

C. changes TV channels

D. connects circuit parts

2

Which of the following has properties that can change without a break between values?

A. analog signal

B. carrier

C. digital signal

D. pulse

2

Which of the following carries out a computer’s instructions?

A. ENIAC

B. circuit

C. microprocessor

D. transistor

2

A semiconductor conducts current better than which of the following?

A. conductor

B. sound wave

C. insulator

D. analog signal

2

Which of the following have made it possible for today’s computers to be so small?

A. transistors

B. modems

C. vacuum tubes

D. integrated circuits

2

In a CD player, which of the following shines on a CD from below?

A. electron

B. laser

C. pulse

D. electromagnetic wave

2

Which of the following are carriers of radio and TV signals?

A. laser signals

B. electron beams

C. electromagnetic waves

D. fluorescent waves

2

The bulb in a remote control that sends information to a TV is called what?

A. transistor

B. circuit board

C. light-emitting diode

D. remote control

2

What does a transistor do?

A. decreases electric current

B. increases electric current

C. stores electric current

D. creates electric current

2

Which of the following devices does NOT perform an output function?

A. speaker

B. printer

C. mouse

D. monitor

2

Which element forms the basis for semiconductors?

A. oxygen

B. gallium

C. arsenic

D. silicon

2

Which of the following objects changes sound waves into an electric current in order to transmit information?

A. telephone

B. radio

C. television

D. telegraph

2

Which of the following is an example of input hardware?

A. monitor

B. keyboard

C. printer

D. speaker

2

Beams of electrons that shine on fluorecent materials are used in

A. telephones.

B. telegraphs.

C. televisions.

D. radios.

COMPLETION

-Complete the following questions by selecting the correct answer from the word bank. Misspelled words will be marked as incorrect. Some answers may be used more than once, others may not be used at all. (2 pts. each)

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A device that can be used as an amplifier or as a switch is called a(n) ______________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A device that allows electric current to travel in only one direction is called a(n) _____________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

Modern computers have a(n) _________________, which is a single semiconductor chip that controls and executes microcomputer’s instructions.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

The sounds you hear from a compact disc are a result of the sound being carried by a(n) _______________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A set of instructions or commands that tell a computer what to do is called ______________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A mouse and keyboard are examples of _______________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A(n) ________________ has properties that can change without a break between values.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

Semiconductors are used in electronic devices because their conductivity can be changed by ________________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A substance that conducts electric current better than an insulator but not as well as a conductor is a(n) _____________.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

____________ is the addition of impurities to a semiconductor to change its conductive properties.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A ____________ contains circuits that supply current to different parts of electronic devices.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A __________ can change current from AC to DC.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

A ___________ is used in amplifiers and switches.

Word Bank

circuit board(s) diode(s) transistor(s) digital signal(s) software analog signal(s) hardware microprocessor(s) semiconductor(s) internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

_____________ of sounds are used to make vinyl records.

Word Bank

circuit board(s) diode transistor digital signal software analog signal hardware microprocessor semiconductor internet doping light emitting diode input hardware output hardware integrated circuits telephone television telegraph speaker mouse

2

____________ have discrete values of 0 and 1.

MATCHING

-Complete the following matching questions by clicking on the correct answer. Only one answer is correct. (2 pts. each)

2

An element or compound that conducts electric current better than an insulator does.

2

The addition of an impurity to a semiconductor to change the arrangement of electrons.

2

An electronic device that allows electric charge to move mainly in one direction.

2

A component that amplifies current.

2

A circuit whose components are formed on one semiconductor.

2

Anything that can be used to send information, such as sound or movement.

2

A type of signal whose properties can change continuously in a given range.

2

A type of signal that can be represented as a sequence of separate values such as 0 and 1.

2

An electronic device that can accept data and instructions, follow the instructions, and output the results.

2

A single chip that controls and executes a computer’s instructions.

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