Geography

Yes, the course is available with DU. You can do B.A. or B.Sc. Geography. It is based on merit list prepared and released by July mid in DU website. Registration would begin in June end. Here is the website:
http://du.ac.in/du/index.php?page=geography
You can go through for other details.

For Delhi University, you have to register first with the official website. Application process is online only. DU will open admissions in June, most probably in the last week. Then in second or third week of July, they will release merit list having percentage at which they are providing admission.
www.du.ac.in

Hi,
There might be few differences otherwise core content remains the same. You can check the website of the respective university in which you wish to get admission.

It all depends on your level of understanding and interest of that particular subject. For some people, Geography is easy and interesting and for some
public administration and political Science.

Please do a Master in Physics only, if not you can think about MBA or MCA to build great careers. These courses would help utilize and build on your competencies and capabilities you already have or have built over the course of B.Sc.