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# HW4 - Homework 4 Physics 204 summer 2008 Part 1 1 Read...

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Homework 4 Physics 204, summer 2008 Part 1 1. Read section 10.1 in Physics: The First Science. 2. In a lightning bolt, 16 C of charge flows in a time of 1. . Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 20 m from the bolt? 3 5 10 s × 5 5.2 10 T × 5 8 10 T × es. 4 10 m × 3. Chapter 10 problem 1 4. At New York City, the earth's magnetic field has a vertical component of that points downward (perpendicular to the ground) and a horizontal component of 1. that points toward geographic north (parallel to the ground)> What is the magnitude and direction of the magnetic force on a 25.0 m long, straight wire that carries a current of 31 A perpendicularly out of the ground? 5. A square coil of wire containing a single turn is placed in a uniform 0.20 T magnetic field, as the drawing shows. Each side has a length of 0.22 m, and the current in the coil is 12 A. Determine the magnitude and direction of

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