a) What is the magnitude of the ion's acceleration? b) When the ion goes through the small hole in the positive plate, explain why it is not pulled back in the opposite direction? ( Hint: What is the electric field like outside two parallel plates?)
A simple and common way to accelerate charged particles is shown below, where there is a
uniform electric field between two plates. Ions are released, usually from a hot filament, near
the negative plate, and there is a small hole in the positive plate that allows the electrons to
continue moving.
Suppose we release an ion with a mass of 2.824 x 10^-26 kg, and a charge of --2e from rest and accelerate it through an electric field of 1.61 x 10^4 N/C, then:
a) What is the magnitude of the ion's acceleration?
b) When the ion goes through the small hole in the positive plate, explain why it is not pulled back in the opposite direction? ( Hint: What is the electric field like outside two parallel plates?)
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