The positive RF peaks of an AM voltage rise to a maximum

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The positive RF peaks of an AM voltage rise to a maximum value of 12V and drop to a minimum value of 4V. The modulation index assuming single tone modulation is—

1. 3
2. 1
  3
3. 1
  4
4. 1
  2

Correct Option: D

Given, V_max = 12V and V_min = 4V, we know that modulation index.

μ =	V_max - V_min
	V_max + V_min

=	12 - 4	=	8	=	1
	12 + 4		16		2