බෝග නිෂ්පාදනයට දේශගුණික සාධකවල බලපෑම

Click https://www.youtube.com/watch?v=5FWvY5aNjD0&list=PLlyv4_Vxwl-yvJPBQ5ljlngFIJlzVUwkW&index=17 link to open resource.