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04 - Digital and Analogue

 1. The sound waves that your mouth produces when you speak are ____________ - the waves vary in a smooth way.

  light particles

  watery

  digital

  analogue

 2. An analogue signal is one which has a value that varies smoothly.
earlyyears_Analog-and-Digital-Signals.jpg

  TRUE

  FALSE

 3. Computers (and most other modern electronic devices such as cameras, mobile phones, etc.) are ?digital? devices because they ___________ in the form of numbers (digits).

  process data

  hear sounds

  make waves

  delete sounds

 4. Everything stored and processed inside a computer is a number (digital)

  TRUE

  FALSE

 5. Computers are unable to process analogues signals because they are digital devices.

  FALSE

  TRUE

 6. For digital devices such as computers, to work with analogue devices, _______________ is required?

  subversion

  wavification

  conversion

  deletion

 7. If you want to attach an analogue input device to a digital device such as a computer, you will need an analogue to digital convertor (ADC).

  TRUE

  FALSE

 8. A good example of a computer peripheral that requires an _____ is a microphone.
earlyyears_demo_analoguedigitalmic.png

  Analogue register

  ADC

  DAC

  Digital switch

 9. When you plug a microphone into a computer, you are actually plugging it into an ADC which converts the analogue signals from the microphone into _________ that the computer can then process.

  waves

  music

  digital data

  letters

 10. If you want to attach an analogue output device to a digital device such as a computer, you will need a digital to analogue convertor ______.

  ADD

  CAD

  DAC

  ADC

 11. Fill in the blanks for the following: 
A good example of a computer peripheral that requires a 
DAC is a __________________________. When you plug a 
loudspeaker into a computer, you are actually plugging 
it into a DAC, which takes digital data from the computer 
and converts it into analogue signals which the loudspeaker
 then converts into sound.

  microphone or modem

  plug or socket

  loudspeaker or headphones

  off and on buttons


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