Telecommunication part 1
Quiz by Tiziana Motta
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- Q1What is the speed of light in a vacuum?100 meters per second1,000,000 meters per second10,000 meters per second299,792,458 meters per second20s
- Q2What is the electromagnetic spectrum?The range of all types of radio wavesThe range of all types of electromagnetic radiationThe range of all types of visible lightThe range of all types of sound waves20s
- Q3What type of electromagnetic wave has the shortest wavelength?Ultraviolet radiationRadioInfrared radiationGamma rays20s
- Q4What type of electromagnetic wave has the highest frequency?Gamma raysInfrared radiationVisible lightRadio waves20s
- Q5What is the range of the visible light spectrum?500-800 nanometers380-700 nanometers300-500 nanometers800-1000 nanometers20s
- Q6What is the relationship between wavelength and frequency?InverseUnrelatedRandomDirect20s
- Q7What type of electromagnetic wave is used in microwave ovens?MicrowavesX-raysUltraviolet radiationInfrared radiation30s
- 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
falsetrueTrue or False15s - 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