. What is the importance of modulation factor (ma) in amplitude modulation?
The modulation factor ma determines the strength and quality of the transmitted signal. In an AM wave, the signal is contained in the variations of carrier amplitude. When the carrier is modulated to a small degree (i.e. smaller ma), the amount of carrier amplitude variation is small. Consequently, the audio signal being transmitted will not be strong. The greater the modulation factor, the stronger and clearer will be the audio signal.