1. The problem statement, all variables and given/known data For the attached emitter follower circuit, calculate the maximum ac power (Sinusoidal signal) delivered to an attached load. I have already calculated Rout of the circuit as 19.2Ω, and the voltage at the emitter at operating point (no input signal) as 10.7V (I know these to be correct). 2. Relevant equations Ohms Law Power equations 3. The attempt at a solution Max Power transfer implies a load resistor f Rl=Ro=19.2Ω The maximum amplitude sine wave that could be applied at emitter before railing is 20V-10.7V=9.3V This is an rms value of6.58V A sine wave of this rms voltage across the load would give (6.58V)^2/19.2Ω = 2.25W of Power. The answer however says "emitter voltage at operating point = 10.7V. this is equivalent to an rms of 7.57V" - I dont understand why we us this voltage. it then says "only half this appears across the load resistor (3.79V)" - I don't understand why. Isn't the ac voltage across the load equal to the ac voltage at the emitter? this then gives the correct answer as "(3.79V)^2/19.2 = 0.75W" Any help in explaining this would be greatly appreciated. Many thanks in advance.