An ac source of voltage amplitude 10 V delivers electric energy at a rate of 0.80 W when its current output is 2.5 A. What is the phase angle between the emf and the current?

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An ac source of voltage amplitude 10 V delivers
electric energy at a rate of 0.80 W when its
current output is 2.5 A. What is the phase angle
between the emf and the current?
Transcribed Image Text:An ac source of voltage amplitude 10 V delivers electric energy at a rate of 0.80 W when its current output is 2.5 A. What is the phase angle between the emf and the current?
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