A magnetic field depicts how a moving charge flows around a magnetic object.
Magnetic force is a force that arises due to the interaction of magnetic fields.
It can be either a repulsive or attractive force.
The magnetic lines of force, indicate the region in which the force of the magnet can be detected.
This region is called the magnetic field.
The magnetic lines of force, or flux, leave the north pole and enter the south pole.
The magnetic force on a current-carrying wire in a magnetic field is given by →F=I→l×→B.
For part a, since the current and magnetic field are perpendicular in this problem, we can simplify the formula to give us the magnitude and find the direction through the RHR-1.