ch19_lecture-3-S08-11.ppt

# ch19_lecture-3-S08-11.ppt - A current generates magnetic...

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A current generates magnetic field A current generates magnetic field

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Magnetic field generated by Magnetic field generated by B= μ o I/2 π r I r × B B r I > > < < > B= μ o I/2r A long, straight current A current loop N S
A long straight vertical segment of wire traverses a magnetic field of magnitude 2.0 T in the direction shown in the diagram. The length of the wire that lies in the magnetic field is 0.060 m. When the switch is closed, a current of 4.0 A flows through the wire from point P to point Q . 1. Which one of the following statements concerning the effect of the magnetic force on the wire is true? (a) The wire will be pushed to the left. (b) The wire will be pushed to the right. (c) The wire will have no net force acting on it. (d) The wire will be pushed downward, into the plane of the screen. (e) The wire will be pushed upward, out of the plane of the screen. 2. What is the magnitude of the magnetic force acting on the wire? (a) 0.12 N (c) 0.48 N (e) 0 N (b) 0.24 N (d) 67 N X X

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A loop of wire with a weight of 1.47 N is oriented vertically and carries a current I = 1.75 A. A segment of the wire passes through a magnetic field directed into the plane of the page as shown. The net force on the wire is measured using a balance and found to be
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## This note was uploaded on 02/27/2010 for the course PHYSICS 215 taught by Professor Lawn during the Spring '10 term at Academy of Art University.

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ch19_lecture-3-S08-11.ppt - A current generates magnetic...

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