NTA Abhyas JEE Main2020PhysicsCommunication SystemPractice

An amplitude modulated wave is as given in figure. Calculate the percentage modulation,

Options

A66 . 67 %
B33 . 33 %
C85 . 67 %
DNone of These

Correct answer

A. 66 . 67 %

Step-by-step solution

From the diagram, Maximum voltage V ⁡ max = 1 0 0 2 = 5 0 V ⁡ Maximum voltage V ⁡ min = 2 0 2 = 1 0 V ⁡ Percentage modulation μ = V ⁡ max - V ⁡ min V ⁡ max + V ⁡ min × 1 0 0 = 5 0 - 1 0 5 0 + 1 0 × 1 0 0 = 4 0 6 0 × 1 0 0 = 6 6 · 6 7 %

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