The electron beam inside a television picture tube is 0.40
Chapter 22, Problem 57GP(choose chapter or problem)
Problem 57GPThe electron beam inside a television picture tube is 0.40 mm in diameter and carries a current of 50 μA. This electron beam impinges on the inside of the picture tube screen.a. How many electrons strike the screen each second?b. The electrons move with a velocity of . What electric field strength is needed to accelerate electrons from rest to this velocity in a distance of 5.0 mm?c. 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?Hint: What potential difference produced the field that accelerated electrons? This is an emf.
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