Which of the following is not a unit of self-inductance
$Weber / Ampere$
$Ohm -Second$
$Joule - Ampere$
$oule - Ampere^{-2}$
Which is not a unit of electric field
The unit of length, velocity and force are doubled. Which of the following is the correct change in the other units?
$SI$ unit of pressure is
In a practical unit if the unit of mass becomes double and that of unit of time becomes half, then $8$ joule will be equal to .............. unit of work.
Unit of Stefan's constant is