Question

line integral of electric field

Answer 1

The multiplication of electric field and the path length gives Line integral of electric Field.

Let there be two point A and B on a non uniform electric field (magnitude and direction at every point is different). The irregular line denotes the path travelled by charge. With changing Electric field, the path travelled by a charge also changes at every point on the curve.

Line Integral

To find line integral at every point, take a very small length dl on the path. So that dl makes a certain angle θ with the electric field.