Which of the following system of units is not based on units of mass, length and time alone
$SI$
$MKS$
$FPS$
$CGS$
What is unit system ? Write different types of system of units.
$Kilowatt - hour$ is a unit of
What are the units of $K = 1/4\pi {\varepsilon _0}$
$Dyne/cm^2$ is not a unit of