5. A wire 0.50 m long carrying a current of 8.0 A is at right angles to a 0.40 T magnetic field. How strong a force acts on the wire? 6. A wire 0.75 m long carrying a current of 6.0 A is at right angles to a uniform magnetic field. The magnitude of the force acting on the wire is 0.60 N. What is the strength of the magnetic field? 7. A force of 5.78 x 10- N acts on an unknown particle traveling at a 90 angle through a magnetic field. If the velocity of the particle is 5.65 x 10* m/s and the field is 3.20 x 10"? T a. What charge does the particle carry? b. How many elementary charges does this represent