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Telecommunication part 1

Quiz by Tiziana Motta

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20 questions
Show answers
  • Q1
    What is the speed of light in a vacuum?
    100 meters per second
    1,000,000 meters per second
    10,000 meters per second
    299,792,458 meters per second
    20s
  • Q2
    What is the electromagnetic spectrum?
    The range of all types of radio waves
    The range of all types of electromagnetic radiation
    The range of all types of visible light
    The range of all types of sound waves
    20s
  • Q3
    What type of electromagnetic wave has the shortest wavelength?
    Ultraviolet radiation
    Radio 
    Infrared radiation
    Gamma rays
    20s
  • Q4
    What type of electromagnetic wave has the highest frequency?
    Gamma rays
    Infrared radiation
    Visible light
    Radio waves
    20s
  • Q5
    What is the range of the visible light spectrum?
    500-800 nanometers
    380-700 nanometers
    300-500 nanometers
    800-1000 nanometers
    20s
  • Q6
    What is the relationship between wavelength and frequency?
    Inverse
    Unrelated
    Random
    Direct
    20s
  • Q7
    What type of electromagnetic wave is used in microwave ovens?
    Microwaves
    X-rays
    Ultraviolet radiation
    Infrared radiation
    30s
  • Q8

    Electromagneticwaves are waves of electric and magnetic energy generated by the oscillationand acceleration of an electric charge.

    FALSE

    TRUE

    15s
  • Q9

    Electromagnetic waves have alternating...

    crests and  trough

    frequency and amplitude

    frequency and amplitude

    waves and crests

    20s
  • Q10

    Only lower energy electromagnetic waves are used in communication 

    TRUE

    FALSE

    15s
  • Q11

    There is scientific evidence that lower energy electromagnetic waves  of the EM spectrum are dangerous for human health

    false
    true
    True or False
    15s
  • Q12

    Exposure to the higher energy part of the electromagnetic spectrum can cause:

    skin burnt

    cancer

    eye sore

    damages to hearing 

    20s
  • Q13

    Telecommunication is the use of...

     electrical and electronic communication systems to transmit and receive messages over long distances.

    all the devices that can send and receive data from all over the world in a fraction of seconds.

    digital transmission over long distances.

    the reproductions of the signal or image being transmitted

    20s
  • Q14

    In the telecommunication system the messages are transmitted though ....

     

    cables or radio waves

    none of the above

    cables only

    infrared rays

    20s
  • Q15

    Cables can be:

    wired elements for electromagnetic waves

    matallic made of copper or metal alloys

    cables are no longer used

    metal wires or optical fibres

    15s

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