Modulation index in Amplitude Modulation

Q.  A modulation index of 0.5 would be same as
- Published on 12 Oct 15

a. 0.5 of Modulation Depth
b. 1/2% of Modulation Depth
c. 5% of Modulation Depth
d. 50% of Modulation Depth

ANSWER: 50% of Modulation Depth
 
Modulation depth is typically the modulation index expressed as a percentage of the figure. Thus a modulation index of 0.5 is expressed as a modulation depth of 50%. However, often the two terms and figures may be used interchangeably. For a modulation index of 1.0, it means 100% modulation, i.e., the carrier level falls to zero level and rises to twice of its un modulated level.

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