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# A 2.2 kΩ resistor in a stereo system dissipates 42 mW of power. what is the voltage across the resistor?

A 2.2 kΩ resistor in a stereo system dissipates 42 mW of power. what is the voltage across the resistor?

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- billrussell42Lv 71 decade agoFavorite Answer
P = E²/R

.042 = E²/2200

E² = 92.4

E = 9.61 volts

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