# 71. In a photocell, ultraviolet (UV) light provides enough

## Problem 71 Chapter 17

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition

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Problem 71

71. In a photocell, ultraviolet (UV) light provides enough energy to some electrons in barium metal to eject them from a surface at high speed. See Fig. 1733. To measure the maximum energy of the electrons, another plate above the barium surface is kept at a negative enough potential that the emitted electrons are slowed down and stopped, and return to the barium surface. If the plate voltage is -3.02 V (compared to the barium) when the fastest electrons are stopped, what was the speed of these electrons when they were emitted?

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##### ISBN: 9780321569837

The full step-by-step solution to problem: 71 from chapter: 17 was answered by Sieva Kozinsky, our top Physics solution expert on 09/09/17, 04:43AM. Physics: Principles with Applications was written by Sieva Kozinsky and is associated to the ISBN: 9780321569837. The answer to “71. In a photocell, ultraviolet (UV) light provides enough energy to some electrons in barium metal to eject them from a surface at high speed. See Fig. 1733. To measure the maximum energy of the electrons, another plate above the barium surface is kept at a negative enough potential that the emitted electrons are slowed down and stopped, and return to the barium surface. If the plate voltage is -3.02 V (compared to the barium) when the fastest electrons are stopped, what was the speed of these electrons when they were emitted?” is broken down into a number of easy to follow steps, and 92 words. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. Since the solution to 71 from 17 chapter was answered, more than 234 students have viewed the full step-by-step answer. This full solution covers the following key subjects: electrons, barium, surface, plate, speed. This expansive textbook survival guide covers 33 chapters, and 4141 solutions.

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