Suppose you need to find the magnetic field near the intersection of two long straight current-carrying wires. Assume that one wire lies directly on the top of the other. Let the intersection of the wires be the origin of a coordinate system and let the point of interest, which is in the same plane, have coordinates (x,y). Recall that the magnetic field is a vector, having both a magnitude and direction.
a. What is the direction of magnetic field B1 due to current I1?
b. What is the direction of magnetic field B2 due to current I2? Explain
c. What are the only two possible directions for the net magnetic field at this point?
