(a)[3]
State the meaning of a $\textit{modulated carrier wave}$.
(b)[3]
State three reasons why modulated carrier waves are used, instead of transmitting electromagnetic waves with audio frequencies directly.
Physics 9702 · AS & A Level · Characteristics of alternating currents
Characteristics of alternating currents — practice question
In commercial radio, audio signals are carried by carrier waves after those carrier waves have been modulated.