Question: A horizontal magnetic field of 1.7×104T is at an angle of 31 degree to the direction of the current in a straight, horizontal wire 74cm long.
Part A: If the wire carries a current of 19A , what is the magnitude of the force on the wire?
Part B: What angle(s) would be required for the force to be half the value found in part A, assuming nothing else is changed?
If possible just a brief explanation how you got the answer?