B.Sc. Sem-III Physics paper-II Unit-II Diffraction of Light Notes
B.Sc. Sem-III Physics Paper-I Unit-IV Power Supply Notes
B.Sc. Sem-III Physics Paper-I Unit-III Notes on Ultrasonic Waves
https://drive.google.com/file/d/1liDpmlhc0YXne6MkCWThYyehoo_lxhWX/view?usp=sharing
A Video Lecture on Full Wave Rectifier
https://youtu.be/rs1mmPNuJoY