Answer to Question #46226 in Electric Circuits for promise

Question

The following are true about electric field lines except that they

a. are drawn such that the magnitude of the field is proportional to the number of lines crossing a unit area perpendicular to the lines

b. not intersect one another
c. are discontinuous and may terminate in a vacuum
d. give the direction of motion of a unit positive test-charge under the action of the electrostatic force