An electron e travels through a small hole in plate A and then toward plate B. A

Question

An electron e travels through a small hole in plate A and then toward plate B. A uniform electric field in the region between the plates then slows the electron without deflecting it. (a) What is the direction of the field? (b) Four other particles similarly travel through small holes in either plate A or plate B and then into the region between the plates. Three have charges +q_1, +q_2, and -q_3. The fourth (labeled n) is a neutron, which is electrically neutral. Does the speed of each of those four other particles increase, decrease, or remain the same in the region between the plates?

Explanation / Answer

a) the field direction is in the opposite direction of the motion of the electron, I.e. from plate B to A.

b) if the field direction remsins the same, +q1 will speed up, +q2 will slow down, -q3 will also speed up.

n will retain its speed..

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