Each channel of a stereo receiver is capable of an average power output of 100?

Question

Each channel of a stereo receiver is capable of an average power output of 100?W into an 8-? loudspeaker

Each channel of a stereo receiver is capable of an average power output of 100?W into an 8-? Loudspeaker What is the rms voltage fed to the speaker at the maximum power of 100?W? Express your answer to one significant figure and include the appropriate units. What is the rms current fed to the speaker at the maximum power of 100?W? Express your answer to one significant figure and include the appropriate units

Explanation / Answer

P = 100 W

R = 8 ohm

maximum power transfer occurs when Ri=Rl

rms voltage =2 sqrt(pR) = 56.56 V

rms current = 56.56/8 = 7.07 A

rms voltage = sqrt(8) = 2.828V

rams current = 2.828/8 = 0.3535 A

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