04dd302 Problem 7: The figure above on the left shows, in cross section, four thin wires that are parallel, straight,and very long. They carry identical currents I in the directions indicated. Initially all four wires areat distance d from the origin of the coordinate system. (a) What is the magnetic field in the origin?Answer: B = . (b) To what distance r from the origin, along the x-axis, must you move wire 1in order to have the magnetic field in the origin make an angle of 30° above the r-axis. Answer: =x = dV3+2

(a) Since all the wires carry same current I, and are equidistant from the origin, the magnitude of…

Answered: Problem 7: The figure above on the left…

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PROBLEM 1. As shown in the figure, a uniform magnetic field B points upward, in the plane of the paper. Then the current is turned on in a long wire perpendicular to the paper. The magnetic field at point 1 is then found to be zero. From this information, draw the magnetic field vector at point 2 when the current is on. Draw the vector starting at the black dot. The location and orientation of the vector will be graded. The length of the vector will not be graded. Explain your reasoning. 2• H Wire 1.
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