investigatory project on full wave rectifier. how to do?

Please follow the link given below:

https://www.meritnation.com/ask-answer/question/plz-tell-me-how-to-construct-full-wave-rectifier-for-the-pr/semiconductor-electronics-materials-devices-and-simple-circu/1619278 

And for further assistance please have a look: http://www.allprojectreports.com/CBSE-HBSE-School-Projects/Physicsprojectreport.htm