Question

What happens when a current carrying wire is placed in a magnetic field?

Answer 1

Current carrying wire basically consists of the moving charge carriers in the wire and when a charge carriers is moving in a magnetic field it experiences a magnetic force. So, the current carrying wire will experience a force given by $\overrightarrow{F}=I\overrightarrow{l}\times \overrightarrow{B}$ where $I$ is the current carried by the wire, $\overrightarrow{l}$ is the length of the wire and the direction is in the direction of current flowing and $\overrightarrow{B}$ is the magnetic field.

The direction of the force experienced by the conductor is given by the Flemming's Left Hand Rule.