Question Detail
Question
At electrostatic equilibrium, the electric field lines are always directed _________ to the surface of conductors.
Correct Answer
Option C is the correct answer.
Detailed Explanation
Page 18, under 'Arrangement of Charges on a Conductor', states: 'As such, field lines are perpendicular to the surface of conductors.'
Hint
If field lines were not perpendicular, there would be a tangential component of the force, causing charges to move and thus not being in equilibrium.