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A sinusoidal carrier voltage of 120 V is amplitude modulated by a sinusoidal voltage of frequency 10KHz. What is the modulation index if the maximum modulated carrier amplitude is 150 V ?A. A. 0.2B. B. 0.25C. C. 0.3D. D. 0.45 |
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Answer» Correct Answer - B `A_C`=120 V , `A_"max"`= 150 `therefore A_m=A_"max"-A_C=150-120`= 30 V `therefore mu=A_m/A_C=30/120`=0.25 or 25% |
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