Please answer and explain to these in not less than 3 sentences. Thank you! 1. How can a sheet of copper be made to emit electrons thermionically? 2. Why do electrons cross the gap in a vacuum tube? 3. Besides tungsten, what other materials are used for cathodes in vacuum tubes? 4. What is the advantage of directly heated cathodes?

Please answer and explain to these in not less than 3 sentences. Thank you! 1. How can a sheet of copper be made to emit electrons thermionically? 2. Why do electrons cross the gap in a vacuum tube? 3. Besides tungsten, what other materials are used for cathodes in vacuum tubes? 4. What is the advantage of directly heated cathodes?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter30: Atomic Physics

Section: Chapter Questions

Problem 1PE: Using the given charge-to-mass ratios for electrons and protons, and knowing the magnitudes of their...

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I need explanations to each problem in more than three sentences 1. Why do electrons cross the gap in a vacuum tube? 2. Besides tungsten, what other materials are used for cathodes in vacuum tubes? 3. What is the advantage of directly heated cathodes? 4. How can a sheet of copper be made to emit electrons thermionically?
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