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Unformatted text preview: Physics 25 Practice Final 3 hours, 3 Pages Final: 8am, Wed., June 11, 1640 Broida Harry Nelson Sunday, June 8 Write your answers in blue books. Calculators and two pages of notes allowed. No textbooks allowed. Please make your work neat, clear, and easy to follow. It is hard to grade sloppy work accurately. Generally, make a clear diagram, and label quantities. Make it clear what you think is known, and what is unknown and to be solved for. Except for extremely simple problems, derive symbolic answers, and then plug in numbers (if necessary) after a symbolic answer is available. Put a box around your final answer... otherwise we may be confused about which answer you really mean, and you could lose credit. Figure 1: For use in Problem 1. 1. As shown in Fig. 1, a taut wire passes through the gap of a small magnet, where the field strength is 10,000 gauss. The length of the wire in the gap is 1 cm. Calculate the amplitude of the induced alternating voltage when the wire is vibrating at its fundamental frequency of 1000 Hz with an amplitude of 0.1 cm. Figure 2: For use in Problem 2....
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