The electron beam inside an old television picture tube is0.40 mm in diameter and carries a current of 50 µA. Thiselectron beam impinges on the inside of the picture tube screen.a. How many electrons strike the screen each second?b. What is the current density in the electron beam?c. The electrons move with a velocity of 4.0 × 107 m/s. Whatelectric field strength is needed to accelerate electrons fromrest to this velocity in a distance of 5.0 mm?d. Each electron transfers its kinetic energy to the picture tubescreen upon impact. What is the power delivered to the screenby the electron beam?

Answered: || The electron beam inside an old…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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 µA. This
electron beam impinges on the inside of the picture tube screen.
a. How many electrons strike the screen each second?
b. What is the current density in the electron beam?
c. The electrons move with a velocity of 4.0 × 107 m/s. What
electric field strength is needed to accelerate electrons from
rest to this velocity in a distance of 5.0 mm?
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?

Expert Solution

Step 1

*** Since there are more than three subparts in the given question So, according to the Bartleby guidelines, the first three subparts are answered. To gen an answer for the rest of the questions, you need to post them separately. ***

Given Data,

Diameter of the tube (d)= $0.40 m m$

Current (I)= $50.0 μ A$

Velocity of the electron(v)= $4.0 \times 10^{7} m / s$

Distance(x)= $5.0 m m$

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