Write the dimensional formula for energy density.

Dimensions of magnetic field intensity are:

The dimensions of the universal gravitational constant are:

Two quantities $A$ and $B$ are related by the equation $A/B = m$,where $m$ is linear density and $A$ is force. The dimensions of $B$ are equivalent to which of the following?

The dimensions of a couple are

In $SI$ units,the dimensions of $\sqrt {\frac{{{\varepsilon _0}}}{{{\mu _0}}}} $ are: