Question: An electron is suspended in a vacuum between two oppositely charged horizontal parallel plates. The separation between the plates is 3.00 mm. (a) What are

An electron is suspended in a vacuum between two oppositely charged horizontal parallel plates. The separation between the plates is 3.00 mm.
(a) What are the signs of the charge on the upper and on the lower plates?
(b) What is the voltage across the plates?

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