Question

Create a diagram and explain the right-hand rule for the motor principle.

Draw a diagram of a single loop DC motor and label all the parts. Write a few sentences explaining how the motor is able to spin.

thank you

Answer 1

a) when a current carrying conductor is located in an external magnetic field perpendicular to the conductor, the conductor experiences a force that is both perpendicular to both itself and the external magnetic field.

b)

When the coil is powered, a magnetic field is generated around the armature. The left side of the armature is pushed away from the left magnet and drawn towards the right, causing rotation. When the coil turns through 90 degrees, the brushes lose contact with the commutator and the current stops flowing through the coil. However, the coil keeps turning because of its own momentum. Now when the coil turns through 180 degrees, the sides get interchanged. As a result the commutator ring P is now in contact with brush Y and commutator ring Q is in contact with brush X. Therefore, the current continues to flow in the same direction