The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.2 cm apart with a 26 kV potential difference between them. The electrons enter through a small hole in the negative plate, accelerate, then exit through a small hole in the positive plate. Assume that the holes are small enough not to affect the electric field or potential. • Part A What is the electric field strength between the plates? Express your answer to two significant figures and include the appropriate units. ? E- Value Units Submit Reauest Answer • Part B With what speed does an electron exit the electron gun if its entry speed is close to zero? Note: The exit speed is so fast that we really need to use the theory of relativity to compute an accurate value. Your answer to part B is in the right range but a little too big. Express your answer to two significant figures and include the appropriate units. Vexit Value Units

The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.2 cm apart with a 26 kV potential difference between them. The electrons enter through a small hole in the negative plate, accelerate, then exit through a small hole in the positive plate. Assume that the holes are small enough not to affect the electric field or potential. • Part A What is the electric field strength between the plates? Express your answer to two significant figures and include the appropriate units. ? E- Value Units Submit Reauest Answer • Part B With what speed does an electron exit the electron gun if its entry speed is close to zero? Note: The exit speed is so fast that we really need to use the theory of relativity to compute an accurate value. Your answer to part B is in the right range but a little too big. Express your answer to two significant figures and include the appropriate units. Vexit Value Units

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter7: Electric Potential

Section: Chapter Questions

Problem 70P: A simple and common technique for accelerating electrons is shown in Figure 7.46, where there is a...

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