Two long parallel straight wires carry equal currents in opposite directions.At a point midway between the wires, the magnetic field they produce is:
A)zero
B)non-zero and along a line connecting the wires
C)non-zero and parallel to the wires
D)non-zero and perpendicular to the plane of the two wires
E)none of the above

Question

Quizplus · Accepted Answer

According to the right-hand rule, the magnetic field produced by each wire will form a circular pattern around the wire. At the midpoint between the wires, the two magnetic fields will combine to form a resultant magnetic field that is perpendicular to the plane of the two wires. Therefore, the answer is D, non-zero and perpendicular to the plane of the two wires.

Two Long Parallel Straight Wires Carry Equal Currents in Opposite