A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of 120 V and 80 V respectively. The amplitude of each side band is :

Question

A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of 120 V and 80 V respectively. The amplitude of each side band is :, 15 V, 10 V, 20 V, 5 V

MARKS App · Accepted Answer

Given here, A c + A m = 120 . . . 1 A c - A m = 80 . . . 2 From equation 1 and 2 , we have 2 A c = 200 ⇒ A c = 100 V and A m = 20 V Modulation index μ = 20 100 = 1 5 Amplitude of each side band = A c μ 2 = 100 × 1 10 = 10 volt

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