Question

state the principle and working of dynamo with a video

Answer 1

Heyy!
Rajdeep here...

A dynamo or an AC generator works on the principle of ELECTROMAGNETIC INDUCTION
...according to which, of a conducting coil is made to rotate in a magnetic field, an induced electro motive force is developed in the coil, due to which current flows in the coil..
You can get videos on YouTube and google...

Thanks!