What value of sinusoidal audio power is...

Question 1 of 27070oelxPVa9rzCAUkpvJGFS

What value of sinusoidal audio power is required to insure 100% modulation when the DC plate input to a modulated Class C amplifier has an efficiency of 60 % , and is 200 W?

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Question 1 of 27070

What value of sinusoidal audio power is required to insure 100% modulation when the DC plate input to a modulated Class C amplifier has an efficiency of 60 % , and is 200 W?

🔍 Key Concepts

• Amplitude modulation (AM) and what 100% modulation means in terms of audio power vs. carrier power • Relationship between DC input power, efficiency, and RF carrier output power in a Class C amplifier • How the required audio power for 100% modulation compares to the RF carrier power (fraction or multiple)

💭 Think About

• First, find the RF carrier output power from the given 200 W DC plate input and 60% efficiency. How do you calculate that? • For 100% sinusoidal modulation, how does the audio power relate mathematically to the carrier RF power in a plate‑modulated Class C amplifier? • Once you know the carrier power and the fraction/multiple needed for 100% modulation, which choice is closest to that required audio power?

✅ Before You Answer

• Be sure you compute RF carrier output power = DC input × efficiency correctly and keep track of units (watts). • Recall that for 100% sinusoidal modulation in a plate‑modulated stage, the required audio power is a specific fraction of the carrier power, not equal to it. • Double‑check that your final audio power figure matches one of the answer choices exactly before selecting.