Discussion
In a communication system, noise is most likely to affect the signal
Answer: B
In a communication system noise is most likely to affect the signal in the channel, option B: the signal passes through the medium between the transmitter and the receiver, where atmospheric, industrial and extraterrestrial noise is picked up and the signal is weakest. The transmitter works at a high signal level, so noise is relatively small there, the information source is not where noise is added, and at the destination the signal has already been received and amplified. The answer is the channel.
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