A particle with positive charge q is moving with speed v Which of the following expressions gives the magnetic field at the point r due to the moving charge? along the z axis toward positive z. At the time of this problem it is located at the origin, a = y = z =0. Your A. Po quxr task is to find the magnetic field at various locations in 47 2 the three-dimensional space around the moving charge. ( B. Ho quXT Figure 1) Ho qr xu Ho qr xu D. ATT 3 A only O B only O C only O D only both A and B both C and D both A and C both B and D Submit Request Answer Part B Find the magnetic field at the point 71 = 1 i. Express your answer in terms of /40, q, v, and $1, and use i, j, and k for the three unit vectors. View Available Hint(s) AEd - 0Q ? nymbols B(71) = Submit Part C Find the magnetic field at the point 72 = y1j. Express your answer in terms of Ho, q, , 21, and y1, and use i, j, and k for the three unit vectors. Figure AEd 4 0E ? B(72 ) =\f