1)
a. A long, straight wire carries current I = 3.15 A that is to
the left, as shown in the sketch. What are the magnitude and
direction of the magnetic field due to the wire at point P, d =
0.270 m below the wire?
b. A circular loop of wire with
radius 0.170 m carries
current I = 3.60 A in
the counterclockwise direction, as shown in the figure below. What
are the magnitude and direction of the magnetic field at the center
of the loop (point P)?