116.1b Amplitude Modulation (AM) MJ13 P41 Q11 | A2 Communication | Cambridge A Level Physics

Описание: How to use info signal to vary amplitude of carrier signal? Try out the simulation below!
00:00 Displacement vs time graphs
04:11 Describing AM
05:12 Bandwidth and sidebands
08:41 Example MJ13 P41 Q11 #9702s13p41

SIMULATION
Amplitude Modulation (https://www.geogebra.org/m/WAby9sC8)
Frequency Modulation (https://www.geogebra.org/m/ANBK5wfK)

9702/41/M/J/13: A radio station emits an amplitude-modulated wave for the transmission of music. #A2amP4 #Lv2
(a) (i) State what is meant by an amplitude-modulated (AM) wave.
(ii) Give two reasons why the transmitted wave is modulated, rather than transmitting the information signal directly as a radio wave.

(b) The variation with frequency f of the amplitude A of the transmitted wave is shown in Fig. 11.1. For this transmission, determine (i) the wavelength of the carrier wave, (ii) the bandwidth, (Iii) the maximum frequency, in Hz, of the transmitted audio signal.

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