question_answer

The figure shows the path of a positively charged particle 1 through a rectangular region of uniform electric field as shown in the figure. What is the direction of electric field and the direction of deflection of particles 2, 3 and 4?

A)  Top; down, top, down

B)  Top; down, down, top

C)  Down; top, top, down

D)  Down; top, down, down

Correct Answer: A

Solution :

The figure shows the path of a +ve charged particle (1) through a rectangular region of uniform electric field. 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.