What is the principal of DC Generator?

BASIC PRINCIPLE OF OPERATION

The generator is an application of electromagnetic induction. It works on theprinciple that when a wire is moved in a magnetic field, then the current isinduced in the coil. A rectangular coil is made to rotate rapidly in the magneticfield between the poles of a horse shoe type magnet. When the coil rotates, it cutsthe lines of magnetic force, due to which a current is produced in the generatorcoil. This current can be used to run the various electrical appliances