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 12 V 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,
E_max = 12V, E_min = 4V

μ =	E_max − E_min
	E_max + E_min

μ =	12 − 4	=	8	=	1
	12 + 4		16		2