The current in a wire is directed along the y axis in a uniform magnetic field. The resulting force on the wire is directed along the negative x axis. The magnetic field is directed along the
A) z axis.
B) -z axis.
C) +x axis.
D) -y axis.

Question

Quizplus · Accepted Answer

The direction of the force on a current-carrying wire in a magnetic field is given by the right-hand rule. If the current is along the y-axis and the force is along the negative x-axis, the magnetic field must be directed along the -z axis for the right-hand rule to apply.

The Current in a Wire Is Directed Along the Y