State and prove principle of parallel axes.

State and prove principle / theorem of perpendicular axes.

State and prove the principle / Theorem of parallel axes.

State Theorem of parallel Axes

State principle of perpendicular axis.

State and explain the principle of superposition of waves.

State and explain the principle of superposition of interacting charges.

State Archimedes' principle.

State Huygens' Principle.

State and explain principle of potentiometer.

State and explain the principle of conservation of angular momentum. Use a suitable illustration. Do we use it in our daily life ? When ?