2004 2003 2002 2001 2000
  (Sub-Topics) Screening (%) Mains(%)
  1. Photoelectric effect 0 4
  2. Bohr’s atomic model 5.71
  3. X-rays 2.85 0
  4. Radioactivity 2.85 0
  5. Nuclear energy. 0 0
Total 11.41 10