For an amplitude modulated wave the minimum amplitude is 3 V, while the modulation index is 60%. The maximum amplitude of the modulated wave is:
Options

Question

For an amplitude modulated wave the minimum amplitude is 3 V, while the modulation index is 60%. The maximum amplitude of the modulated wave is:

G1 Physics · Accepted Answer

For an amplitude-modulated wave, modulation index: m = (A(max) − A(min))/(A(max) + A(min)) Given: m = 0.60 A(min) = 3 V So, 0.60 = [A(max) − 3]/[A(max) + 3] 0.60A(max) + 1.8 = A(max) − 3 0.40A(max) = 4.8 A(max) = 12 V Hence option B follows.