12. [-/1 Points] DETAILS SERCP11 19.7.OP.047. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER At what distance (in mm) from a long, straight wire carrying a current of 28 A will the magnitude of the magnetic field be 1.2 mT? mm Need Help? Read It 13. [-/6 Points] DETAILS SERCP11 19.7.P.048. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The two wires shown in the figure below are separated by d = 10.8 cm and carry currents of I = 5.20 A in opposite directions. (a) Find the magnitude and direction of the net magnetic field at a point midway between the wires. magnitude direction ---Select--- (b) Find the magnitude and direction of the net magnetic field at point P1, 10.8 cm to the right of the wire on the right. magnitude direction ---Select--. (c) Find the magnitude and direction of the net magnetic field at point P2, 2d = 21.6 cm to the left of the wire on the left. magnitude HT direction --Select-- Need Help? Read It Submit Answer 14. [-/1 Points] DETAILS SERCP11 19.9.P.059.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A long solenoid that has 1,110 turns uniformly distributed over a length of 0.445 m produces a magnetic field of magnitude 1.00 x 10"# T at its center. What current is required in the windings for that to occur? mA Need Help? Read It Master It 15. [-/1 Points] DETAILS SERCP11 19.9.P.060. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A certain superconducting magnet in the form of a solenoid of length 0.78 m can generate a magnetic field of 8.5 T in its core when its coils carry a current of 80 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find the number of turns in the solenoid. turns Need Help? Read It