(a(i))[2]
State the meaning of an amplitude-modulated (AM) wave.
(a(ii))[2]
Give two reasons why the transmitted wave is modulated rather than sending the information signal directly as a radio wave.
(b(i))[2]
The way amplitude $A$ changes with frequency $f$ for the transmitted wave is shown in Fig. 11.1. For this transmission, find the wavelength of the carrier wave.
(b(ii))[1]
Find the bandwidth.
(b(iii))[1]
Find the maximum frequency, in Hz, of the transmitted audio signal.