Question

The ratio of SI units to CGS units of density is:

• A. ${10}^4$
• B. ${10}^2$
• C. ${10}^{-2}$
• D. ${10}^{-3}$

Answer 1

The correct option is D ${10}^{-3}$

SI unit of density is $kg/m^3$ and its CGS unit is $gm/c{m}^3$

Thus ratio of SI to CGS units $\frac{kg/m^3}{gm/c{m}^3}=\frac{1000gm/(100cm{)}^3}{gm/c{m}^3}={10}^{-3}$