Test2 - Physics 106 Sections 1 & 2 Midterm Exam #2 Fall...

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Midterm Exam #2 – Fall 2011 Instructor: Lawrence Rees 3-digit CID: _______ This test has 25 problems. The CID is only used to return your test. Do NOT write your name on this test form. Mark the best answer for each problem on the answer form (the bubble sheet). Be careful to enter your answers correctly. Your bubble sheet answer is your final answer. No notes or written materials are allowed except for a foreign language dictionary. You may not use equations or other information stored in your calculator. Possible useful information ݇ = 8.99 × 10 ±ܰ݉ / ܥ ߳ = 8.85 × 10 ିଵଶ ±ܥ /( ܰ݉ ) ݁ = 1.60 × 10 ିଵଽ ±ܥ ݌ = 10 ିଵଶ ±±±݊ = 10 ିଽ ±±±ߤ = 10 ି଺ ±±±݉ = 10 ିଷ ±±±݇ = 10 ±±ܯ = 10 ±±±ܩ = 10 ±±±ܶ = 10 ଵଶ 1. A conducting rectangular loop falls from rest into a magnetic field B as shown in the figure. This magnetic field is coming out of the page. What is the direction of the current in the loop just after the top edge is entirely within the field and the bottom edge is out of the field ? A. Clockwise B. Counterclockwise C. There is no current because the flux is not changing. D. There is no current because part of the coil is outside the external magnetic field. E. There is no current because the loop is not accelerating. 2. A square coil of wire 2.00 cm on a side has 12 loops. It is placed in the field of an electromagnet so that the normal to the loop points in the same direction as the field of the electromagnet. If the magnetic field increases from zero to 240 mT in 2.00 s, what is the voltage around the loop? A. 1.44 V B. 1.15 mV C. 576 μV D. 48.0 μV
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3. A single loop of wire is placed within a uniform magnetic field of 178 mT. The resistance of the loop is 0.132 Ω. The area of the loop is 0.000685 m 2 . The loop is originally oriented so that the normal to the loop points into the page, the same direction as the external magnetic field. The loop is then rotated by 30° about the dotted line shown in the figure. This rotation takes 350 ms. What is the average
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Test2 - Physics 106 Sections 1 & 2 Midterm Exam #2 Fall...

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