Question

how does the generator works​

Answer 1

A generator works on the principle of electromagnetic induction

When two magnets are kept and a coil is spun between the magnets cutting the magnetic field

So this change in magnetic field induce current in the coil

Answer 2

The electric generator works on the principle of ELECTROMAGNETIC INDUCTION which states that WHEN A COIL IS SET TO MOTION IN BETWEEN A UNIFORM MAGNETIC FIELD, THE ELECTRIC CURRENT IS INDUCED IN IT and the direction of MFL is given by Fleming's Right Hand Rule.