Physics 1. atomic-structure 2. current-electricity 3. elasticity 4. electromagnetic-induction-and-alternating-current 5. electron-photon-photoelectric-effect-and-x-rays 6. electrostatic 7. gravitation 8. magnetic-effect-of-current 9. motion-in-two-dimension 10. newtons-laws-of-motion 11. nuclear-physics-radioactivity 12 physical-world 13. reflection-of-light 14. rotational-motion 15. simple-harmonic-motion 16. semi-conductor-devices 17. surface-tension 18. thermodynamics 19. units-dimensions-and-measurement 20. wave-motion 21. wave-optics 22. work-energy-power-and-collision