An infinitely long straight wire carries a current of 15 A vertically upward. A 0.25 m long conductor is situated 6 cm north of the wire and is oriented horizontally along the east–west line. The conductor carries a current of 4 A towards the east. Find the magnitude of the force acting on the conductor.
a) 2.5×10−5N
b) 0N
c) 5.0×10−5N
d) 1.0×10−4N