31. Alternating Current
Power in AC Circuits
3:47 minutes
Problem 25.51
Textbook Question
Textbook Question(II) An average power output of 150 W is sent into a 4-Ω loudspeaker (see Fig. 25–14). What are the rms voltage and the rms current fed to the speaker
(b) at 1.0 W when the volume is turned down?
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