A horizontal magnetic field of 1.1×10?4 T is at an angle of 31 to the direction of the current in a straight, horizontal wire 80 cm long.
A) If the wire carries a current of 18 A, what is the magnitude of the force on the wire? (Express in N)
B) What angle(s) would be required for the force to be half the value found in part A, assuming nothing else is changed? (Express in degrees)