Module 24 - Electromagnetic Technologies Question Preview (ID: 55547)
Electromagnetic Technologies.
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Which of the following radio wave frequencies would be best to transmit and receive wireless information?
a) 30 GHz
b) 300 MHz
c) 300 KHz
d) 3 KHz
Which of the following is true about radio waves?
a) Radio waves have the highest frequency, smallest wavelengths, and highest energy.
b) Radio waves have the highest frequency, largest wavelengths, and highest energy.
c) Radio waves have the lowest frequency, largest wavelengths, and highest energy.
d) Radio waves have the lowest frequency, largest wavelengths, and lowest energy.
Which of the following do cellphones, televisions, and wireless computer networks (wifi) all have in common?
a) They are all beneficial to humans by receiving and transmitting signals through compressional waves.
b) They are all beneficial to humans by receiving and transmitting signals through radio waves
c) They are all beneficial to humans by receiving and transmitting signals through longitudinal waves
d) They are all beneficial to humans by receiving and transmitting signals through ultra-violet waves
Which of the following is an electromagnetic energy used to transmit and detect waves that is designed to benefit humans?
a) Radio waves
b) Microwaves
c) Infrared radiation
d) All of the answer choices
Which of the following is a technology that uses electromagnetic energy to meet human needs?
a) Cell phones
b) WIFI
c) Bluetooth
d) All of the answer choices
Which of the following is NOT a use of infrared radiation?
a) Night vision and security cameras
b) Police scanners
c) Cell phones
d) Remote controls
Fiber optic cables transmit a tremendous amount of information which of the following types of electromagnetic waves?
a) visible light
b) x-rays
c) infrared radiation
d) radio waves
Which of the following electromagnetic waves can be extremely dangerous?
a) gamma
b) x-rays
c) ultraviolet rays
d) All of the answer choices
Which of the following electromagnetic waves can transmit the most information?
a) visible light
b) infrared radiation
c) microwaves
d) radio waves
Which of the following can be recorded, stored for future recovery, and transmitted over long distances without substantial loss?
a) digital information
b) gamma rays
c) x-rays
d) all of the answer choices
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