Hello Savita,

There are too many doors are open after completing graduation in b.sc with physics and math's, you can go to the different sector like Banking, Railways, Defense, Data Science, Teacher and many more. Here is the some options you can try to give these government exams like-

1- UPSC

2- SSC CGL

3- RRB Entrance exam

4- SBI PO

5- IBPS PO

6- CDS

7- AFCAT

8- AIIMS Nursing Exam

after clearing these exams you can placed to different reputed positions, And if are looking for abroad there is also a alot option where you can contribute but for that you need a contract for the work visa which is not a cake walk, best thing you can do is complete your masters in  the country where you would like to work and many countries have the law to provide you a 1 year residency to find best job for you or you can try the job which is totally different from your filed like like English Teacher, tourism. Networking, Recruiter etc.

Hope this will help, Best Of Luck!!