assuming that PU means Pre University course which is a 2 year secondary education course in Karnataka the first year of the courses generally known as first PUC and second year is 2nd PUC the subject subjects in the field course are physics chemistry mathematics or biology computer science or Electronics or something like that.If you want to pursue the puc,  you must have pass the 10th standard from a recognise school or institution and the course include 6 subjects English or secondary language which can be of your choosing 3 course subject and one option or subject. Syllabus for each subject is very different. For example the first PUC physics includes topics like physical world units and Measurement etc.You can look for more information and the given link below the detailed  The details syllabus is given there.

kARNATAKA STATE BOARD