College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300



College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

(a) Find the potential difference ΔVB required to stop an electron (called a “slopping potential”) moving with an initial speed of 2.85 × 107 m/s. (b) Would a proton traveling at the same speed require a greater or lesser magnitude potential difference? Explain. (c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, ΔVpVe. The answer should be in terms of the proton mass mp and electron mass me.


To determine
The potential difference required to stop the electron.


Given info: Initial speed of the electron is 2.85×107m/s .


Formula to calculate the potential difference is,


  • ΔPE is the change in electric potential energy.
  • e is the elementary charge.

The change in potential energy is equal to the kinetic energy. Therefore,


  • m is the mass of the electron.
  • v is the speed of the electron.

From the above equations,


Substitute 1.6×1019C for e, 2.85×107m/s for v and 9


To determine
The stopping potential of proton.


To determine
The ratio of proton stopping potential and electron stopping potential.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Water intoxication cannot occur because water is so easily excreted by the body. T F

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

21. Name each compound:

Chemistry In Focus

Why are some quantities called fundamental?

An Introduction to Physical Science

List the differences between mitosis and meiosis in the following chart:

Human Heredity: Principles and Issues (MindTap Course List)