Both BSc Physics and Bachelor of Computer Applications both are good courses after passing 12th grade with science stream . it will provides you better career options in future .

It is completely depend on your own interest and ability to choose courses between BSc Physics and Bachelor of Computer Applications

BSc Physics course will provides you education about natural science that involves the study of matter and its motion through space time, along with related concepts such as energy and force.

Bachelor of Computer Applications gives knowledge for Computer Applications or Application software designed to help the user to perform singular or multiple related specific tasks.
On other side bsc physics .

B.Sc. Physics Job Types
Physics Tutor - Home Tutor
Physics Degree Lecturer
Assistant Professor - Physics
Associate Auditor-Physics
Lecturer - Maths, Physics, Chemistry & Biology
Proof Reader - Physics & Chemistry

B.C.A. Job Types
Finance Managers
Teacher & lecturer
Marketing Manager
Business Consultant
Chief Information Officer
Computer Programmer
Computer Systems Analyst
Computer Scientist
Computer Support Service Specialist
Computer Presentation Specialist
Database Administrator
Independent Consultant
Information Systems Manager
Systems Administrator
Software Developer
Software Publisher