Digital-Logic-Design
October 21, 2023UGC NET CS 2009 Dec-Paper-2
October 21, 2023UGC NET CS 2013 Dec-paper-2
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Question 4
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The VLF and LF bauds use _______ propagation for communication.
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Ground
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Sky
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Line of sight
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Space
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Question 4 Explanation:
The VLF and LF bauds use ground propagation for communication.
Propagation methods are 3 types
1. Ground
2. Sky
3. Line of sight
→ Very low frequency or VLF is for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.
→ The low-frequency signals travel in all directions from the transmitting antenna.
Propagation methods are 3 types
1. Ground
2. Sky
3. Line of sight
→ Very low frequency or VLF is for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.
→ The low-frequency signals travel in all directions from the transmitting antenna.
Correct Answer: A
Question 4 Explanation:
The VLF and LF bauds use ground propagation for communication.
Propagation methods are 3 types
1. Ground
2. Sky
3. Line of sight
→ Very low frequency or VLF is for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.
→ The low-frequency signals travel in all directions from the transmitting antenna.
Propagation methods are 3 types
1. Ground
2. Sky
3. Line of sight
→ Very low frequency or VLF is for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.
→ The low-frequency signals travel in all directions from the transmitting antenna.