The magnetic field at the midpoint between two parallel (straight) current-bearing wires (current traveling in same direction) is (using the right-hand rule)
A) double what it would be due to a single wire.
B) equal to what it would be due to a single wire.
C) half what it would be due to a single wire.
D) exactly zero.

Question

Quizplus · Accepted Answer

The magnetic fields due to each wire at the midpoint between them will have equal magnitude but opposite directions (using the right-hand rule), thus they cancel each other out, resulting in a net magnetic field of zero.

The Magnetic Field at the Midpoint Between Two Parallel (Straight)