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# Magnetism_MIXED_Review_ANSWERS - Version PREVIEW Magnetism...

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Version PREVIEW – Magnetism MIXED Review – marshall – (710) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Conceptual 17 Q03 001 10.0 points An electric current runs through a coil of wire as shown. A permanent magnet is located to the right of the coil. The magnet is free to rotate. N S Pivot i i What will happen to the magnet if its orig- inal orientation is as shown in the figure? 1. rotate clockwise correct 2. Unable to determine 3. rotate counterclockwise 4. remain still Conceptual 17 Q12 002 10.0 points A current is flowing clockwise around a loop placed on your desk. What would be the direction of the result- ing magnetic field inside the loop? 1. counterclockwise 2. downward correct 3. upward 4. clockwise 5. no magnetic field was generated. Serway CP 19 47 003 10.0 points What current is required in the windings of a long solenoid that has 1930 turns uni- formly distributed over a length of 0 . 368 m in order to produce a magnetic field of magnitude 0 . 000466 T at the center of the solenoid? The permeability of free space is 4 π × 10 7 T · m / A . Correct answer: 70 . 7077 mA. Serway CP 19 50 004 (part 1 of 2) 10.0 points An electron moves at a speed of 18000 m / s in a circular path of radius 2 . 2 cm in a solenoid. The magnetic field of the solenoid is perpen- dicular to the plane of the electron’s path. The permeability of free space is 4 π × 10 7 T · m / A. Find the strength of the magnetic field in- side the solenoid. Correct answer: 4 . 6522 μ T. 005 (part 2 of 2) 10.0 points Find the current in the solenoid if it has 37 turns / cm. Correct answer: 1 . 00057 mA. Solenoid 006 (part 1 of 2) 10.0 points A solenoid of length 3 . 63 m consists of 22 . 37 turns and carries a current of 736 A. The permeability of free space is 4 π × 10 7 T · m / A . Find the magnitude of the magnetic field at the center of the solenoid. Assume that the solenoid length the radius of the solenoid. Correct answer: 0 . 00569963 T. 007 (part 2 of 2) 10.0 points Find the magnitude of the magnetic field along the axis of the solenoid at the ends of the solenoid. Asusme again that the solenoid length its radius. Correct answer: 0 . 00284982 T. Solenoid 02 008 10.0 points Note: The strength of the magnetic field de-

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Version PREVIEW – Magnetism MIXED Review – marshall – (710) 2 creases the farther you get away from the solenoid. A constant current is flowing through a solenoid, creating a magnetic field.
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