we say that energy can neither be created nor be destroyed so if it can not be created ,  then from where the energy comes

- It is a universal fact that energy can neither be created nor be destroyed, it can only be converted from one form to another.

 

- A simple example is the working of Motor.

- A motor is a device that converts electrical energy into mechanical energy, but this electrical energy is further obtained by applying potential difference and converting chemical  energy of certain electrons into an electrical energy.

- The chemical energy is further a result of atomic and sub atomic energies that the electrons and electrical charges hold.

- Moving ahead,

 The electrical energy is used to transform the coil into magnet, and the interaction of magnetic field is used to convert it into a mechanical force.  

- Thus gaining mechanical movement from the electrical energy.

 

Therefore, the source and the end point of energy can be understood by comparing it with a circle, having no point of origin and no point of termination.

What is obvious is that every energy is a result of transformation from an another type of energy.