Question

The maximum amplitude for an amplitude modulated wave is found to be 12V while the minimum amplitude is found to be 3V. The modulation index is 0.6x where x is ______.

Options

• 2

• 3

• 1

• 4

Answer 1

The maximum amplitude for an amplitude modulated wave is found to be 12V while the minimum amplitude is found to be 3V. The modulation index is 0.6x where x is 1.

Explanation:

From question,

A_max = A_c + A_m = 12     ...(i)

A_min = A_c - A_m = 3        ...(ii)

From eq (i) and (ii)

A_c = `15/2` and A_m = `9/2`

Modulation index `"A"_"m"/"A"_"c"= (9//2)/(15//2)`

= 0.6 ∴ x = 1