Ph.D

Doctor of Philosophy (Ph.D.) in Nursing and Doctor of Nursing Practice (DNP) degree programs are for registered nurses who want to advance in the field. Career options will vary based on the type of degree program completed, but typical career paths are as follows:
Nursing or medical profession researcher
Post secondary nursing instructor
Nurse practitioner
Clinical nurse specialist
Nurse midwife

Hi Aditi,
For Ph.D admissions, you need to first see which university offers Ph.D and research program in your discipline. Then you need to communicate with the department's supervisor. It is different than a typical MS or BS program. So, firstly, you need to research about which universities have related research work and look out for the Ph.D notifications, proceed accordingly. As an international applicant, you must take the IELTS/TOEFL or the GRE, etc., depending on where you are planning to pursue your Ph.D.

You should apply online. They even offer scholarships for Indian students but not always. You need to complete IELTS test for which you need to spend 10000-12000 INR. Now you can apply for universities like Harvard and Birmingham and all. If you apply now, for June 2018 admission, it's better. All the best.

If you want to switch your field than it is a good option. Doing MBA will open a number of doors for you in the corporate world. If you want to explore new job profiles than go for an MBA.

Eligibility for Ph.D in Nuclear Physics is as follows:
1) M.Phil degree and PG degree in a relevant discipline with minimum 55% marks or an equivalent grade from a university or from a recognized institution of higher training.
2) 5-years of work experience at a senior level in teaching/professional experience.