# HW16 - Platt David – Homework 16 – Due 4:00 am – Inst...

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Unformatted text preview: Platt, David – Homework 16 – Due: Oct 14 2005, 4:00 am – Inst: Ken Shih 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. 001 (part 1 of 2) 10 points An unusual message delivery system is pic- tured in the figure. A 28 cm length of con- ductor (that is free to move) is held in place between two thin conductors. All of the wires are in a magnetic field. When a 11 . 2 A cur- rent is directed as shown in the figure, the wire segment moves upward at a constant velocity. The acceleration of gravity is 9 . 8 m / s 2 . . 28 m 11 . 2 A 11 . 2 A 11 . 2 A Assuming the wire slides without friction on the two vertical conductors and has a mass of 39 g, find the magnitude of the minimum magnetic field that is required to move the wire. Answer in units of T. 002 (part 2 of 2) 10 points What is its direction? 1. Into page 2. Out of page 3. Toward the top edge of the page 4. None of these 5. Toward the right edge of the page 6. Toward the left edge of the page 7. Toward the bottom edge of the page 003 (part 1 of 2) 10 points The gravitational force on loop is downward. A rectangular loop with dimensions (hor- izontal = 0 . 48 m) × (vertical= 1 . 104 m), is suspended by a string, and the lower hori- zontal section of the loop is immersed in a...
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HW16 - Platt David – Homework 16 – Due 4:00 am – Inst...

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