Physics help needed with The World's Simplest Motor?

Question

Can anyone explain the operation of the rotating coil and tell me where I can find some diagrams showing the rotating coil in various operations? Also, can anyone explain how the worlds simplest motor can be used as an electric generator?

Answer 1

1. A moving electric charge creates a magnetic field.
A torque is developed if a magnetic field and magnetic field generated by a loop of electric current are not aligned. (basic concept of a motor)

2. A magnetic field applies force on an electric charge. Generators are motors in reverse. Now we have a mowing magnetic field that generates current.

See reference below. Well illustrated too.