The electron beam inside an old television picture tube is 0.40 mm in diameter and carries a current of 50 uA. This elec

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The Electron Beam Inside An Old Television Picture Tube Is 0 40 Mm In Diameter And Carries A Current Of 50 Ua This Elec 1 (17.36 KiB) Viewed 41 times

I am struggling to find the correct solution to part D.
The electron beam inside an old television picture tube is 0.40 mm in diameter and carries a current of 50 uA. This electron beam impinges on the inside of the picture tube screen. You may want to review (Page 742).

Part A How many electrons strike the screen each second? N = 3.1x1014 electrons Submit Previous Answers Correct Part B What is the current density in the electron beam? Express your answer with the appropriate units. J = 400 Submit Previous Answers Correct - Part The electrons move with a velocity of 3.5 X 107 m/s. What electric field strength is needed to accelerate electrons from rest to this velocity in a distance of 5.0 mm? Express your answer with the appropriate units. E = 7.0x105 Submit Previous Answers Correct

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? Express your answer with the appropriate units. P= Value Units Submit Previous Answers Request Answer