The dimensions of impulse are equal to that of

The focal power of a lens has the dimensions

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : Product of Pressure $(P)$ and time $(t)$ has the same dimension as that of coefficient of viscosity.
Reason $R$ : Coefficient of viscosity $=\frac{\text { Force }}{\text { Velocity gradient }}$
Question : Choose the correct answer from the options given below 

If $\varepsilon_0$ is the permittivity of free space and $E$ is the electric field, then $\varepsilon_0 E^2$ has the dimensions

The physical quantity that has the same dimensional formula as pressure is :

Dimensions of resistance in an electrical circuit in terms of dimension of mass $M,$ of length $L$ of time $T$ and of current $I$ , would be