17
QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 17 • LHS Physical Science

Finley is trying to transmit a sound wave that will travel continuously, but he is frustrated by the excess noise. What kind of signal is Finley sending?

Answer
A
analog
B
digital
C
radio
D
infrared

Explanation

An analog signal varies continuously, much like the pressure changes in a sound wave. Since Finley is transmitting a continuously varying sound signal, he is sending an analog signal. Digital signals instead represent information as discrete values, so choice B does not fit.

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