A carrier wave of peak voltage 14 V is used for transmitting a message signal
PHYSICS · Single correct · A Level · Physics · Electronics · Electronics
Problem
A carrier wave of peak voltage 14 V is used for transmitting a message signal. What peak voltage of the modulating signal is needed to achieve a modulation index of 80%?
(1) 11.2 V
(2) 7 V
(3) 22.4 V
(4) 28 V