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Module 24 - Electromagnetic Technologies
Test Description: Electromagnetic technologies
Instructions: Answer all questions to get your test result.
1) Which of the following radio wave frequencies would be best to transmit and receive wireless information?
A
3 KHz
B
300 KHz
C
300 MHz
D
30 GHz
2) Which of the following is true about radio waves?
A
Radio waves have the lowest frequency, largest wavelengths, and lowest energy.
B
Radio waves have the lowest frequency, largest wavelengths, and highest energy.
C
Radio waves have the highest frequency, smallest wavelengths, and highest energy.
D
Radio waves have the highest frequency, largest wavelengths, and highest energy.
3) 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 longitudinal 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 compressional waves.
D
They are all beneficial to humans by receiving and transmitting signals through ultra-violet waves
4) Which of the following is an electromagnetic energy used to transmit and detect waves that is designed to benefit humans?
A
All of the answer choices
B
Infrared radiation
C
Microwaves
D
Radio waves
5) Which of the following is a technology that uses electromagnetic energy to meet human needs?
A
WIFI
B
All of the answer choices
C
Bluetooth
D
Cell phones
6) Which of the following is NOT a use of infrared radiation?
A
Cell phones
B
Night vision and security cameras
C
Police scanners
D
Remote controls
7) Fiber optic cables transmit a tremendous amount of information which of the following types of electromagnetic waves?
A
infrared radiation
B
radio waves
C
visible light
D
x-rays
8) Which of the following electromagnetic waves can be extremely dangerous?
A
ultraviolet rays
B
gamma
C
All of the answer choices
D
x-rays
9) Which of the following electromagnetic waves can transmit the most information?
A
visible light
B
microwaves
C
radio waves
D
infrared radiation
10) Which of the following can be recorded, stored for future recovery, and transmitted over long distances without substantial loss?
A
gamma rays
B
all of the answer choices
C
digital information
D
x-rays
*select an answer for all questions
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