The dimensional formula of $\frac{B^2}{2\mu_0}$ is . . . . . . .

The physical quantity 'Energy Density' has the same dimensional formula as

The force of interaction between two atoms is given by $F = \alpha \beta \exp \left( - \frac{x^2}{\alpha kt} \right)$,where $x$ is the distance,$k$ is the Boltzmann constant,$T$ is temperature,and $\alpha$ and $\beta$ are two constants. The dimension of $\beta$ is:

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 $= \frac{\text{Force}}{\text{Area} \times \text{Velocity gradient}}$
Choose the correct answer from the options given below.

The dimensional formula for Boltzmann's constant is

The dimensional formula of the universal gas constant is: