electric potential due to a disc of charge in urdu/hindi BSc/BS/ADP Physics

Q:- find Electric potential at a point due to a uniform disc of charge Ans:- Consider a disc of uniform charge having radius r let P be a point at a distance Z from the centre of disc at which potential is to be determined divide the disk into Rings then potential at p due to one of such ring of radius w is given by ( write the mathematical calculation from the video here and complete the article)