(10 points) A straight wire of the length 0.2 m is in the uniform magnetic field. When the cure in the wire 4.5 A. the maximum force on it is 1.8N. What is the value of the magnetic field 6. (10 points) The uniform magnetic field is decreasing with the rate 20 T/s. The angle between the magnetic field and the normal direction of the loop with area 0.2 m is 60. What is the electromotive force in the loop?