I am searching for a good book or link or video that might give some fresh idea about half wave rectifier properties I mean in my book prescribe by my university that has introduced some of the basic formulas Like I(rms)=i(m)/2 or I(avg)=I/pai value. But i really want to know about how these formulas originated. I have searched through the internet but they almost have the same kinda thing. I have surfed through the Art of electronics but I think its a little advanced for me and they dont have what im searching for. anyone please share any source or article or anything that would be helpful for me.