An electron in a vacuum chamber is fired with a speed of 8000 km/s toward a...
An electron in a vacuum chamber is fired with a speed of 8000 km/s toward a large, uniformly charged plate 75 cm away. The electron reaches a closest distance of 15 cm before being repelled. Part A What is the plate's surface charge density?
Homework Answers
Solution)
Here, surface charge density is given by
=Eo*m*v^2/ed
=(8.857*10^-12 F/m)*(9*10^-31 kg) *(8*10^6m/s)^2/(1.6*10^-19 C) *(75-15)*10^-2 m
= 5.31*10^-9 C/m^2 (Ans)
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