Question

Which statement is true for electric field lines?

Field lines should always be parallel to the equipotential lines.
Field lines should always be perpendicular to the equipotential lines.
Field lines should always be parallel to each other.
Field lines should always be crossing each other.
Field lines should always be perpendicular to each other.

Answer 1

The appropriate response is the last one. A moment normal for transmitters at electrostatic balance is that the electric field upon the surface of the channel is guided altogether opposite to the surface. There can't be a segment of the electric field that is parallel to the surface.

Answer 2

Field lines should always be perpendicular to the equipotential lines.

Step-by-step explanation:

As we know that equipotential lines are the locus of all points at which potential will remain constant.

So here we can say by the relation of potential difference and electric field is given as

`\Delta V = -\int E.dr`

now if potential is constant or not changing then we will say that change in potential is zero

`0 = -\int E.dr`

so here if electric field is perpendicular to the equipotential lines then in that case the potential will remain constant.

so correct answer will be

Field lines should always be perpendicular to the equipotential lines.