5. Find the direction of the force on a current carrying wire in a magnetic field as shown in the figures. B B xXXXX B x XXXX x XXXX 6. A 100.0 pT magnetic field is directed at an angle of 30 with respect to the x - axis. Find the magnitude and direction of the force on a 20.0 m long wire carrying a current of 20. A in the -x direction as shown in the figure. B X - axisautomatically. 7. In Sydney, Australia the Earth's magnetic field has a magnitude of 50 uT and points due north, inclined at an angle of 60 above the horizontal. (a) Find the force (magnitude and direction) on 50.0 m long wire carrying a current of 15.0 A vertically downward. (b) Find the force (magnitude and direction) on 50.0 m long wire carrying a current of 15.0 A horizontally north. Page 2 of 4 8. The Aurora Borealis is produced when electrons and protons moving in the Earth's magnetic field collide with molecules in the atmosphere and cause them to glow. If the earth's magnetic field is approximately 50 uT, what is the radius of an orbit for (a) an electron with a speed of 1.0 x 10 m/s and (b) a proton with a speed of 5.0 x 10* m/s.9. A circular loop carrying a current of 2.0 A is oriented in a magnetic field of 3.5 T. The loop has an area of 0.12 m2 and is mounted on an axis, perpendicular to the magnetic field, which allows the loop to rotate. What is the torque on the loop when the plane of the loop is oriented at a 37 angle to the field