Which of the following quantities has the same dimensions as that of energy

Dimension of electric current is

Which one of the following quantities has dimensions different from the remaining three

The potential energy of a point particle is given by the expression $V(x)=-\alpha x+\beta \sin (x / \gamma)$. A dimensionless combination of the constants $\alpha, \beta$ and $\gamma$ is

Which of the following is dimensional formula for viscosity?

Which of the following is not a dimensionless quantity?