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Communication miscellaneous
  1. The modulating frequency in frequency modulation is increased from 10 kHz to 20 kHz. The bandwidth is—
    1. doubled
    2. halved

    3. increases by 20 kHz
    4. increased tremendously
Correct Option: C

Since, BW = 2(Δf + fm)
When fm increased from 10 kHz to 20 kHz i.e. 10 kHz BW increased by 20 kHz.


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