BSc. Physical science is an applied Physical Science degree. It’s nothing more than a fancy name. The course covered in this degree is very big. In this course the subjects offered are PHYSICS, MATHEMATICS AND COMPUTER SCIENCE/ELECTRONIC/CHEMISTRY, you have to study these three subjects as well as one allied or concurrent courses. You’ll be studying everything from Physics, Maths, Eco, Eng, and other subjects in three years. This is not all, each subject is then further divided into different papers. So, if you have Physics, you have two parts of it and two papers (each having a syllabus of one main paper from Hons. course). The only benefit of this course is you can choose any specialization for your Msc. or MS.
Hope this helps.