# HW5 - Platt David Homework 5 Due 4:00 am Inst Ken Shih This...

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Platt, David – Homework 5 – Due: Sep 16 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. Note: 1,Always give your answer using SI unit system unless specifically pointed out. Consider it as a rule. 2,For problems 001 and 002, we assume that the filament is long enough compared to the cylinder that field lines emerge from the filament only radially and the field doesn’t change appreciably over the surface of the cylinder. 001 (part 1 of 2) 10 points A uniformly charged, straight filament 7 m in length has a total positive charge of 2 μ C. An uncharged cardboard cylinder 1 cm in length and 5 cm in radius surrounds the filament using the filament as its axis of symmetry, with the filament as the central axis of the cylinder. Find the total electric flux through the cylinder. Answer in units of N · m 2 / C.

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