First slide
Modulation
Question

The antenna current of AM transmitter is 8 A when only carrier is sent but increases to 8.96 A when the carrier is modulated sinusoidal. The percentage modulation is

Moderate
Solution

ItIc=1+m22  8.968=1+m22 1.254=1+m22 m22=0.254            m2=0.508 m=0.71      m%=71%

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