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Unformatted text preview: Version 001 – HW09 – gavrin – (25111) 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Current in Tungsten Wire 001 10.0 points A 0 . 63 V potential difference is maintained across a 2 . 3 m length of tungsten wire that has a cross-sectional area of 0 . 28 mm 2 and the resistivity of the tungsten is 5 . 6 × 10- 8 Ω · m. What is the current in the wire? Correct answer: A. Drift Velocity of Electrons 002 10.0 points A conductor with cross-sectional area 10 cm 2 carries a current of 17 A. If the concentration of free electrons in the conductor is 9 × 10 28 electrons / m 3 , what is the drift velocity of the electrons? Correct answer: 0 . 00117895 mm / s. Electric Shock 003 (part 1 of 3) 10.0 points The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. Above 15 mA, a person loses muscle control, and 70 mA can be fatal. A person with dry skin has amA can be fatal....
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