What is the power delivered to the screen by electron beam

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Reference no: EM13304107

The electron beam inside a television picture tube is 0.4 mm in diameter and carries a current of 55 µA. This electron beam impinges on the inside of the picture tube screen.

A) The electrons move with a velocity of 3.9 multiplied by 107 m/s. What electric field strength is needed to accelerate electrons from rest to this velocity in a distance of 5.0 mm?

B) 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?

Reference no: EM13304107

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