Explanation

(a) The figure shows the path of a +ve charged particle (1) through a rectangular region of uniform electric field.
[image:11_image43.emf]
Since, +ve charged particle moves as a parabolic path in electric field. It means the direction of electric field is upward. The direction of deflection of particle (2) which is –ve is downward. The direction of deflection of particle (3) which is +ve is upward and direction of deflection of particle (4) is downward.