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

question 146

Multiple Choice

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of $2.0 \mathrm {~A}$ , flowing from $A$ to $E$ , as shown in the figure. It is placed in a uniform magnetic field of $0.85 \mathrm {~T}$ in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that $A B$ is parallel to $D E$ and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section DE of this wire?

• A) \(0.30 \mathrm {~N}\) perpendicular out of the page
• B) \(0.30 \mathrm {~N}\) perpendicular into the page
• C) \(0.20 \mathrm {~N}\) perpendicular out of the page
• D) \(0.12 \mathrm {~N}\) perpendicular into the page
• E) \(0.12 \mathrm {~N}\) perpendicular out of the page

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