Final answer:
Yes, it is possible to construct a simple motor with a loop of wire, a magnet, some contacts, and a dry cell. The current through the wire loop interacts with the magnetic field to create rotation, which is sustained by the action of a commutator and brushes to reverse current direction.
Step-by-step explanation:
It is indeed possible to make a motor using a loop of wire, a magnet, some contacts, and a dry cell. When electric current is passed through the wire loop which is situated in a magnetic field, it experiences a force due to the magnetic field. This force is a torque that causes the loop to rotate, and this principle is used in the operation of electric motors.
In a simple motor, the loop of wire is placed between the poles of a magnet. As current flows through the loop, according to the right-hand rule-1, it experiences forces in opposite directions at the sides of the loop closer to the magnet poles, resulting in a net torque that initiates the loop's rotation. Once the plane of the loop becomes aligned with the magnetic field, to keep the rotation continuous, the direction of the current is reversed with the help of a commutator and brushes. This ensures that there is always a torque acting on the loop in the same direction.
So, given a loop of wire, a permanent magnet, a dry cell (as a source of electricity), and contacts in the form of brushes and a commutator to reverse the current at the right moments, one can construct a basic electric motor.