Units & Measurements
Class 11 · Units & Measurements
Unit Conversion
Convert between SI and CGS units — see factor-of-10 conversions for length, mass, force, energy, pressure.
Key Notes
01
SI base units: m (length), kg (mass), s (time), A (current), K (temp), mol (amount), cd (luminosity).
02
CGS: cm, g, s. 1 N = 10⁵ dyne; 1 J = 10⁷ erg.
03
Always multiply by 1 in disguise: e.g., (1 m / 100 cm) to cancel units.
04
Derived units: N = kg·m/s², J = N·m, Pa = N/m², W = J/s.
Formulas
Force
SI → CGS for force.
Energy
SI → CGS for energy.
Pressure
Atmospheric pressure.
Important Points
Always check dimensional consistency after converting units.
Unit Conversion notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 11 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.