PHYSICS 104 Midterm: PHYS 104 UW Madison Exam 3s02

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31 Jan 2019
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Fill in your name, student id # (not your social security #), and section # (under abc of special codes) on the scantron sheet. Fill in the letters given for the first 5 questions on the scantron sheet. These letters determine which version of the test you took, and it is very important to get this right. 2: a square coil, enclosing an area with sides 2. 0 cm long, is wrapped with 250 turns of wire. This force between the magnet and the loop will be attractive when: the magnet enters the loop, the magnet is halfway through, the magnet is leaving the loop, never, always. 3: an ac series circuit has 12 resistance, 15 inductive reactance and 10 capacitive reactance. 4: a radio wave transmits 1. 2 w/m2 average power per unit area. What is the peak value of the associated magnetic field? ( 0 = 4 10 7 t m/a and c = 3. 00 108 m/s)