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The electron beam inside a television picture tube is 0.300mm in diameter and carries a current of 55.0 uA. This electron beam impinges on the inside of the picture tube screen.
Part A How many electrons strike the screen each second?
Part B What is the current density in the electron beam?
Part C The electrons move with a velocity of 3.90 ×107m/s. What electric field strength is needed to accelerate electrons from rest to this velocity in a distance of 5.90mm ?
Part D Each electron transfers its kinetic energy to the picture tube screen upon impact. What is the power delivered to the screen by the electron beam?
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