Physics 1 Problem Solutions 254

Physics 1 Problem Solutions 254 - 250 Chapt. 33 Alternating...

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250 Chapt. 33 Alternating Current or AC a) I 0 V 0 ; φ b) V 0 I 0 ; φ c) V 0 I 0 ; ωt d) V 0 I 0 ; ω e) I 0 V 0 ; ω 033 qmult 00240 1 1 2 easy memory: AC power, phase angle 12. For a circuit branch (which could be a device or circuit system), you have potential drop/rise across and current through given by, respectively, V = V 0 cos( ωt ) and I = I 0 cos( ωt φ ) . The time-average power output/input of the branch is given by: a) P = I 0 V 0 . b) P = I rms V rms cos( φ ), where φ is the phase di±erence between potential and current. c) P = I rms V rms . d) P = I 0 V 0 cos( φ ), where φ is the phase di±erence between potential and current. e) P = I rms /V rms . 033 qmult 00242 1 1 4 easy memory: phase angle of an AC circuit 13. The time-average power supplied by a AC emf is 100 W. The RMS potential rise and currents for the device are, respectively 20 V and 10 A. What is the phase angle? a) 0 . b) 30 . c) 45 . d) 60 . e) 90 . 033 qmult 00250 1 1 1 easy memory: resistor impedance
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This note was uploaded on 11/16/2011 for the course PHY 2053 taught by Professor Buchler during the Fall '06 term at University of Florida.

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