A Wire in the Shape of an "M" Lies in the Plane

question 63

Multiple Choice

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.65 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section BC of this wire?

• A)0 N
• B)0.090 N perpendicular out of the page
• C)0.090 N perpendicular into the page
• D)0.060 N perpendicular out of the page
• E)none of the above

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Definitions:

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Therapeutic Alliance

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Psychosurgical technique in which an electrode wire is inserted into the anterior cingulate gyrus, with the guidance of magnetic resonance imaging, to destroy a very small portion of that brain area with electric current.