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An old-style TV set places 20 kV across two plates of a parallel plate capacitor. An electron is released very close to one plate, and it accelerates rapidly towards the second plate which has a hole drilled through it. The electron exits the hole and hits a phosphor on the glass screen where the picture appears and the phosphor glows.

A. If the plate where the electron is released is 0 V, what is the voltage of the plate with the hole in it? (V)

B. What is the speed of the electron when it exits the hole in the plate? (m/s)

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  • Category:- Physics
  • Reference No.:- M9897520

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