alleryStart learning →Which was the earliest modulation method used for audio in radio broadcasting?
AAM
BFSK
CPM
DFM
Answer & Solution
Correct answer: A. AM
Amplitude modulation was developed first, in the early twentieth century, for sending audio by radio.
Keep practising Communication Systems
Browse all Communication Systems questions for Bihar Board Class 12 (Science), or explore more Physics topics.
Related questions
In plate modulation, audio power needed is what share of RF carrier power?An automatic call distributor does what?Before transmission the transmitter modifies the electric signal forRepeated skipping of a signal between Earth and ionosphere is calledWhat does near-vertical-incidence skywave (NVIS) enable?Signals above about 30 MHz mostly do what to the ionosphere?What mainly causes fading of skywave signals?Why can skywaves reach beyond the horizon?