Q.

If the output power of an amplifier is 10 V, and the input power supplied to the amplifier is 0.229 V given that the DC voltage used is

A. 25%
B. 50%
C. 75%
D. 35%
Answer» A. 25%
Explanation: efficiency of a power amplifier is (pout- pin)/ pdc substituting the given values in the above expression, efficiency of the power amplifier is 25%.
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