🔍 Key Concepts

• Class A vs. Class B amplifier efficiency in basic electronics theory • Typical maximum theoretical efficiency of a Class B push‑pull amplifier • Why 100% efficiency is not achievable in real electronic amplifiers

💭 Think About

• Compare what you remember about the efficiency ranges of Class A, Class B, and Class C amplifiers. Where does Class B usually fall? • Think about whether the given percentages are realistic for an amplifier that still has distortion but is commonly used for better efficiency than Class A. • Ask yourself: which of these values is often quoted in textbooks as the theoretical maximum for an ideal Class B amplifier?

✅ Before You Answer

• Recall that Class A amplifiers are much less efficient than Class B and usually below 50%. • Remember that no practical amplifier can reach 100% efficiency, so eliminate impossible values. • Check which option is closest to the theoretical maximum efficiency of an ideal Class B stage (often cited in basic electronics).