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Question 20222
JEE Physics · Medium

Principles of Communication: Propagation MCQ

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PropagationMediumQuestion 20222

Question

Ground wave propagation is most effective for frequencies:
  1. A
    Above 30 MHz (VHF)
  2. B
    30 MHz – 300 MHz
  3. C
    Below 2 MHz (MF/LF)
    Correct
  4. D
    Above 300 GHz

Correct answer

Below 2 MHz (MF/LF)

Explanation

Ground waves travel along Earth's surface. Attenuation increases sharply with frequency, so this mode is practical only for LF and MF (AM broadcast 530–1710 kHz).

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