Two long parallel wires are 8.0 cm apart and carry currents in opposite directions as shown in the figure.
a) Find the magnitude and direction of the magnetic field at point p due to two 1.50mm segments of wire (not the entire wire) that are opposite each other and each 8.00cm from p. (the size of the segments is significantly small compared to the distance 8.0cm)
b) Find the magnitude and direction of the field at point p due to the two long wires (the entire wires).