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find the R so we will have maximal power on it

so now i need to use this formula

[tex]P_{max}=\frac{1}{8}\frac{|\tilde{V_s}|^2}{R_s}[/tex]

[tex]|\tilde{V_s}|^2=480^2+1440^2=2304000[/tex]

R_s is the real part of the impedance (80)

[tex]P_{max}=\frac{1}{8}\frac{2304000}{80}=28800[/tex]

but here it doesnt resemble at all the maximal power formula

they are counting the average power and saying something about rms

??

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# Homework Help: Maximal power question

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