The SI unit of electric flux ${\Phi }_E$ is:

Solution

1. The electric flux ${\Phi }_E$ is defined by the integral of the electric field $\vec{E}$ over an area $A$, given by ${\Phi }_E=\int \vec{E}\cdot d\vec{A}$.
2. The SI unit for the electric field $\vec{E}$ is volts per meter ($\text{V/m}$), and the SI unit for area $A$ is square meters (${\text{m}}^2$).
3. Multiplying these units together gives $(\text{V/m})\times {\text{m}}^2=\text{V}\cdot \text{m}$.
4. Hence the answer is (A).