Which statement is true for the gradient field F⃗=∇f\vec{F} = \nabla fF=∇f?
∇×F⃗=0\nabla \times \vec{F} = 0∇×F=0
∇⋅F⃗=0\nabla \cdot \vec{F} = 0∇⋅F=0
The line integral along any path depends on the path.
The flux across a surface is always 0.