CBSE has now uploaded supplementary study material on its official website. This study material covers the additional topics included in the Class XII theory syllabus for Physics, in the chapter on Communication Systems, for the March 2015 board examination.
This additional material covers various topics and aspects of internet, mobile telephony and the Global Positioning System (GPS).
The added course content is not available in the textbooks prescribed by the National Council of Educational Research and Training (NCERT). The students/ schools/ teachers were informed prior about the same by the board through a notification issue by the board.
According to the board officials, the supplementary material, which has now been included in the syllabus that was announced earlier, has now been uploaded at the public domain for benefiting the students and teachers.