The maximum efficiency of resistance loaded class A power amplifier is _________________?
Correct answer: D. 25%
- A. 5%
- B. 50%
- C. 30%
- D. 25%
Explanation
For a resistance-loaded class A amplifier, the maximum AC output power is one-quarter of the DC input power, giving a maximum efficiency of 25%. The 50% limit applies to transformer-coupled class A operation.
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