______ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.

Correct option is B

​$$\textbf{Electric Intensity (Electric Field Strength):} \\[8pt]\bullet \ \text{Electric intensity, also known as electric field strength, is defined as the force} \\\quad \text{experienced per unit positive charge placed in an electric field.} \\[6pt]\bullet \ \text{Mathematically, it is given by:} \\[10pt]\text{Electric Intensity } (E) = \frac{F}{q} \, \text{N/C} \\[10pt]E = \frac{Q}{4\pi \varepsilon_0 r^2} \\[10pt]\text{where } F \text{ is the force experienced by a charge } q. \\[10pt]\bullet \ \text{The electric field intensity } E \text{ is a vector quantity and is measured in volts per meter} \\\quad (V/m) \text{ or newtons per coulomb (N/C).}$$​​