Electric Charges and Fields — Physics STD 12 Science — Question

►(i) Electric field lines are imaginary curves drawn in such a way that the tangent to it of each point shows the direction of electric field at that point.
  (ii) Field lines start from positive charges and end at negative charges. If there is a single charge, they may start or end at infinity.
  (iii) In a charge-free region, electric field lines can be taken to be continuous curves without any breaks.
  (iv) Two field lines never cross each other.
  (v) Electrostatic field lines do not form any closed loops.
  (vi) Distribution of electric field lines gives an idea of electric field intensity in that region.
  (vii) Field lines of a uniform electric field are mutually parallel and equidistant.