Question

Drawings I and II show two samples of electric field lines. Then :

• A. the electric fields in both I and II are produced by negative charge located somewhere on the left and positive charges located somewhere on the right
• B. in both I and II the electric field is the same everywhere
• C. in both cases the field becomes stronger on moving from left to right
• D. the electric field in I is the same everywhere, but in II the electric field becomes stronger on moving from left to right

Answer 1

The correct option is D the electric field in I is the same everywhere, but in II the electric field becomes stronger on moving from left to right

The magnitude of electric field at a point can be determined by knowing how closely are the electric field lines packed at that particular point.

In case 1: the field lines are equally spaced everywhere.
In case 2: the field lines are spaced more closely in the right than in the left.