Final answer:
Magnetic field lines surrounding a magnet are called magnetic flux. The magnetic field exerts a force on moving electrons in a current-carrying wire, determined by the right hand rule.
Explanation:
Magnetic field lines that surround a magnet are called magnetic flux. These lines represent the direction in which a small compass points when placed in the magnetic field, with the strength of the field proportional to the density of the lines.
A magnetic field exerts a force on moving electrons in a current-carrying wire. The force is determined by the right hand rule, where the direction of the force is perpendicular to both the current and the magnetic field.
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