If fc is the carrier wave frequency and fm is the modulation frequency, then in the resulting amplitude modulated waveform the upperside band consists of: 

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  1. \(\frac{f_c}{f_m}-2f_m\)
  2. ffm
  3. ffm
  4. f+ 2fm

Answer (Detailed Solution Below)

Option 2 : ffm
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Detailed Solution

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  • Modulation is a technique used for the encoding of information from a message source in a way that is suitable for transmission.
  • This is done by altering the properties of a wave.
  • The Sideband is a band of frequencies, containing power which are the lower and higher frequencies of the carrier frequency.
  • Both sidebands contain the same information.
  • Lower sideband = fc - fm
  • Upper sideband = fc + fm
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