Ph.D

In most Ph.D. programs, you will be given lists of books to read. Some of the recommended books are:-
1. How to write a better thesis by Paul Gruba and David Evans.
2. Helping Doctoral Students to write by Barbara Kamler and PAT Thomson.
3. The unwritten rules of Ph.D. research by Marian Petre and Gordon Rugg.

Top institutes/universities of India which offer Ph.D. in Physics are listed below:
*Institute Of Physics, Bhubaneswar
*Indian Institute Of Technology, Hyderabad
*College Of Science & Technology, Visakhapatnam
*Bharathidasan University
*St. Berchmans College, Kottayam
*Maharaja Krishnakumarsinhji Bhavnagar University
*Goa University
*The Indira Gandhi National Open University (IGNOU)
*Jamia Millia Islamia
*Jiwaji University
*National Institute of Technology.

In 12th, you have scored 55%, therefore, you should try to move abroad, especially, Germany by scoring good marks in IELTS.

You can apply online/offline with the required information. Admission is based on the marks obtained in graduation.

You need to do Ph.D in the same subject in which you have done your post graduation. Subjects are Computer Science Education, Automated assessment of diagrams, Diagrammatic Reasoning and Understanding, Human, Computer Interaction, Computational Musicology, Dynamic models for problem tangles and Improving complex planning negotiations through groupware that assists mutual understanding.
Interaction Design and Usability of Learning spaces in 3D Multi-user Virtual Worlds.

Refer to the link for details: https://www.shiksha.com/mba/course/master-of-business-administration-lateral-entry-wisdom-school-of-management-noida-146767.

Dear Aakriti,
In India it is not possible. However, you can do this in United States. In India, in order to pursue Ph.D, you must to have completed your Masters.