An amplitude modulated signal is [A + 0.5 A cos ωm t] cos ωc t where ωm and ωc are respectively, modulating and carrier frequencies. The power efficiency is

An amplitude modulated signal is [A + 0.5 A cos ωm t] cos ωc t where

1.	An amplitude modulated signal is [A + 0.5 A cos ωm t] cos ωc t where ωm and ωc are respectively, modulating and carrier frequencies. The power efficiency is
A.	11.11%
B.	0.25%
C.	4.32%
D.	50%
Answer» B. 0.25%

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An amplitude modulated signal is [A + 0.5 A cos ωm t] cos ωc t where ωm and ωc are respectively, modulating and carrier frequencies. The power efficiency is

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