Learning Materials
Features
Discover
Chapter 25: Q. 15 (page 709)
A proton with an initial speed of is brought to rest by an electric field.
a. Did the proton move into a region of higher potential or lower potential?
b. What was the potential difference that stopped the proton?
a. The proton shifted to a higher potential.
b.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Your lab assignment for the week is to measure the amount of charge on the 6.0-cm-diameter metal sphere of a Van de Graaff generator. To do so, you’re going to use a spring with a spring constant of 0.65 N/m to launch a small, 1.5 g bead horizontally toward the sphere. You can reliably charge the bead to 2.5 nC, and your plan is to use a video camera to measure the bead’s closest approach to the edge of the sphere as you change the compression of the spring. Your data is as follows:
Use an appropriate graph of the data to determine the sphere’s charge in nC. You can assume that the bead’s motion is entirely horizontal, that the spring is so far away that the bead has no interaction with the sphere as it’s launched, and that the approaching bead does not alter the charge distribution on the sphere.
A proton’s speed as it passes point A is 50,000 m/s. It follows the trajectory shown in FIGURE P25.43. What is the proton’s speed at point B? A proton’s speed as it passes point A is 50,000 m/s. It follows the trajectory shown in FIGURE P25.43. What is the proton’s speed at point B?
Charge is distance from a positive point charge . Charge is distance from . What is the ratio of their potential energies due to their interactions with ?
Charge is distance from the negative plate of a parallel-plate capacitor. Charge is distance from the negative plate. What is the ratio of their potential energies?
shows three points near two point charges. The charges have equal magnitudes. For each part, rank in order, from most positive to most negative, the potentials to .
In Problems 74 through 76 you are given the equation(s) used to solve a problem. For each of these,
a. Write a realistic problem for which this is the correct equation(s).
b. Finish the solution of the problem.
76.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App