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Card 1 of 24

Why modulate a low-frequency audio/data signal onto a high-frequency carrier?

A
  • Direct low-frequency transmission needs reasonably sized antennas.
  • High-frequency carriers use kilometre-long antennas.
B
  • Direct low-frequency transmission needs very high power supplies.
  • High-frequency carriers use reasonably low power.
C
  • Direct low-frequency transmission needs extremely short antennas.
  • High-frequency carriers use much longer antennas.
D
  • Direct low-frequency transmission needs kilometre-long antennas.
  • High-frequency carriers use reasonably sized antennas.

Card 1 of 24

Amplitude (AM) and frequency modulation (FM) techniques (A-level only) Flashcards

  1. A Level
  2. /Physics
  3. /Amplitude (AM) and frequency modulation (FM) techniques (A-level only)

24 flashcards on AQA A Level Physics Amplitude (AM) and frequency modulation (FM) techniques (A-level only): the key terms, definitions and equations you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards