Electric Field Lines - Practice Questions & MCQ

Electric lines of force:

An electric field line is an imaginary line or curve drawn through a region of space so that its tangent at any point is in the direction of the electric field at that point.

Properties of Electric lines of force (Electric field lines):

i) Electric lines of force diverge out from positive charge and converge on the negative charge

ii) The number of field lines is proportional to the magnitude of charge

iii) Lines of force never cross or intersect each other. If they intersect at any point then at that point electric field intensity will have two directions which is not possible. 

iv) Electric field lines do not form a closed loop. Since electric field lines cannot start and end on the same charge.

v) The tangent at a point on electric field lines will give the direction of the force on positively charged particle placed at that point. 

vi) Electric field lines do not give the path of motion of the particle. It may show the path if electric field lines are straight.

vii) Electric field lines are normal to the conductor if it is starting from a conductor or while ending on the conductor.

viii) The uniform electric field is represented by straight, parallel and equidistant lines.

ix) The electric field does not exist inside a conductor.