hw 27 - nguyen (jmn727) homework 27 Turner (59070) This...

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nguyen (jmn727) – homework 27 – Turner – (59070) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 3) 10.0 points An AC voltage oF the Form V = V max sin2 πft, with Frequency 22 Hz and maximum voltage 713 V, is applied across a 33 W light bulb. When the voltage is frst applied, what is the current through the circuit? 1. 0 correct 2. the maximum current 3. the rms current Explanation: Let : t = 0 . The current in the circuit is I = I max sin(2 π f t ) = I max sin 0) = 0 . 002 (part 2 oF 3) 10.0 points When t = T 4 , where T is the period oF the applied voltage, what is the current in the circuit? Correct answer: 0 . 0925666 A. Explanation: Let : V max = 713 V and P = 33 W . t = T 4 = 1 4 f The current in the circuit is I = I max sin(2 π f t ) = I max sin p 2 π f 4 f P = I max sin ± π 2 ² = I max = 2 P V max = 2 (33 W) 713 V = 0 . 0925666 A .
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This note was uploaded on 01/21/2010 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.

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hw 27 - nguyen (jmn727) homework 27 Turner (59070) This...

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