Some Important Concepts

Physics
 * 1) Vernier Callipers (LC= 0.01 cm)
 * 2) Micrometer Srew Gauge (Pitch)
 * 3) Spherometer
 * 4) Post Office Box
 * 5) Tangent Galvanometer (Horizontal & Vertical components of Magnetic fields)
 * 6) Time dilation, length contraction , etc.
 * 7) Types of Pendulums

Chemistry
 * 1) Study of Structures of Ionic Compounds