xHW6 - Version One Homework 6 Savrasov 39821 May 14, 2007 1...

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Unformatted text preview: Version One Homework 6 Savrasov 39821 May 14, 2007 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Lamps in Series 28:03, trigonometry, numeric, > 1 min, nor- mal. 001 (part 1 of 4) 1 points A 20 lamp and a 5 lamp are connected in series and placed across a potential of 50 V. What is the equivalent resistance of the circuit? Correct answer: 25 . Explanation: Let : R 1 = 20 , R 2 = 5 , and V = 50 V . The equivalent resistance of the circuit is R = R 1 + R 2 = 20 + 5 = 25 . 002 (part 2 of 4) 1 points What is the current in the circuit? Correct answer: 2 A. Explanation: I = V R = 50 V 25 = 2 A . 003 (part 3 of 4) 1 points What is the voltage drop across the first lamp? Correct answer: 40 V. Explanation: This is a series circuit, so the voltage drop across the first lamp is V 1 = I R 1 = (2 A)(20 ) = 40 V . 004 (part 4 of 4) 1 points What is the power dissipated in the first lamp? Correct answer: 80 W. Explanation: P 1 = I V 1 = (2 A)(40 V) = 80 W . keywords: Three Parallel Resistors 28:04, trigonometry, numeric, > 1 min, nor- mal....
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This note was uploaded on 03/24/2011 for the course PHYS 13843 taught by Professor Dr.andygavrin during the Spring '10 term at IUPUI.

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xHW6 - Version One Homework 6 Savrasov 39821 May 14, 2007 1...

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