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 1, 2, 3,4?

A) Top, down, top, down

B) Top, down, down, top

C) Down, top, top, down

D) Down, top, down, down

Correct Answer: A

Solution :

\[\vec{F}=q\vec{E}\] direction of \[\vec{F}\]and \[\vec{E}\]is same for positive charge while for negative charge is opposite \[1\to \operatorname{top}\]                     \[3\to \operatorname{top}\] \[2\to \operatorname{down}\]                  \[4\to \operatorname{down}\]