Amplitude modulation power calculations

An AM transmitter has a carrier power Pc=200 W and modulation index m=0.6. The total transmitted power is:

• 272 W

• 236 W

• 248 W

• 212 W

Which statement about AM power distribution is true?

• Total sideband power is always greater than carrier power for m ≤ 1

• Sidebands share power equally

• Reducing m increases total transmitted power

Why is AM transmission considered inefficient in terms of power usage?

• Because the carrier contains no information but consumes most of the power

• Because sidebands have unequal power

• Because m is always less than 1

• Because bandwidth is too large

If the carrier is removed entirely, but both sidebands are transmitted, the resulting system is:

• Standard AM

• SSB

• DSB-SC

• FM

In standard AM, most of the transmitted power is in:

• The Carrier

• The upper sideband

• The lower Sideband

• Equally shared between sidebands and carrier

In AM, sideband power is proportional to:

• m

• m²

• m³

If μ is too small (close to zero) in AM, which is the main drawback?

• Power efficiency is low because most power is wasted in carrier

• Bandwidth becomes too large

• Sidebands dominate and cause interference

• Phase distortion occurs