tsl311 - [cos 2 ωt ] AV = 1 2 , [cos ωt sin ωt ] AV = 0...

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Power in AC Circuits Voltage of ac source: E = E max cos ωt Current through circuit: I = I max cos( ωt - δ ) Instantaneous power supplied: P ( t ) = E ( t ) I ( t ) = [ E max cos ωt ][ I max cos( ωt - δ )] Use cos( ωt - δ ) = cos ωt cos δ + sin ωt sin δ P ( t ) = E max I max [cos 2 ωt cos δ + cos ωt sin ωt sin δ ] Time averages:
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Unformatted text preview: [cos 2 ωt ] AV = 1 2 , [cos ωt sin ωt ] AV = 0 Average power supplied by source: P AV = 1 2 E max I max cos δ = E rms I rms cos δ Power factor: cos δ ~ A ~ ε δ Z , R L C tsl311 – p.1/1...
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This note was uploaded on 04/30/2008 for the course PHYS 204 taught by Professor Andrevantonder during the Spring '07 term at Rhode Island.

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