Bachelors

The following are the top private Universities in India for pursuing Undergraduate courses.
1. Amrita Vishwa Vidyapeetham, Coimbatore
2. Manipal Academy of Higher Education, Manipal
3. Birla Institute of Technology and Science, Pilani
4. Vellore Institute of Technology, Vellore
5. Siksha 'O' Anusandhan, Bhubaneswar
6. Jamia Hamdard New Delhi
7. Kalinga Institute of Industrial Technology, Bhubaneswar.

On the basis of yours 12th marks, you can get the following DU's colleges for B.Sc. Hons. Physics under general category.
1. Bhagini Nivedita College
2. Deshbandhu College
3. Kalindi College
4. Maitreyi College
5. Motilal Nehru College
6. Rajdhani College
7. Shivaji College
8. Swami Shraddhanand College

Yes, you are eligible in most of the universities. But please note that B.Ed is now only available in regular mode only.

SEE I would say This is your choice, In my opinion if you choose this course that better because the Course chosen by any student is better if he or she has an interest in that course. If you are interested in maths then This course is best for you. Lastly, I will say In our mind we choose the course of our interest and courses which helps us to get a job which is the ultimate goal for our study.