Find study content
Learning Materials

Discover learning materials by subject, university or textbook.

Explanations

Textbooks

Exams
All Subjects

Anthropology

Archaeology

Architecture

Art and Design

Bengali

Biology

Business Studies

Greek

Chemistry

Chinese

Combined Science

Computer Science

Economics

Engineering

English

English Literature

Environmental Science

French

Geography

German

History

Hospitality and Tourism

Human Geography

Italian

Japanese

Law

Macroeconomics

Marketing

Math

Media Studies

Medicine

Microeconomics

Music

Nursing

Nutrition and Food Science

Physics

Polish

Politics

Psychology

Religious Studies

Sociology

Spanish

Sports Sciences

Translation

All Subjects

Biology

Business Studies

Chemistry

Combined Science

Computer Science

Economics

English

Environmental Science

Geography

History

Math

Physics

Psychology

Sociology

EXAM TYPES

GCSE

IGCSE

AS

A Level

International A Level

University Admissions Tests

GCSE SUBJECTS

GCSE 1

GCSE 2

GCSE 3

GCSE 4

GCSE 5

SOME-TEXT

IGCSE SUBJECTS

IGCSE 1

AS SUBJECTS

AS 1

A Level SUBJECTS

A Level 1

International A Level SUBJECTS

International A Level 1

University Admissions Tests SUBJECTS

University Admissions Tests 1
Features
Features

Discover all of these amazing features with a free account.

Flashcards

Vaia AI

Notes

Study Plans

Study Sets
What’s new?

Flashcards
Study your flashcards with three learning modes.

Study Sets
All of your learning materials stored in one place.

Notes
Create and edit notes or documents.

Study Plans
Organise your studies and prepare for exams.
Resources
Discover

All the hacks around your studies and career - in one place.

Find a job

Find a degree

Student Deals

Magazine

Mobile App
Featured

Magazine
Trusted advice for anyone who wants to ace their studies & career.

Job Board
The largest student job board with the most exciting opportunities.

Vaia Deals
Verified student deals from top brands.

Our App
Discover our mobile app to take your studies anywhere.

Go to App

Learning Materials

Features

Discover

Chapter 25: Q. 39 (page 711)

A +3.0 nC charge is at x = 0 cm and a -1.0 nC charge is at x = 4 cm. At what point or points on the x-axis is the electric potential zero?

Short Answer

Expert verified

The points are 3 cm and 6 cm

Step by step solution

01

Definition of electric potential

Assume for $q_{1}$ , x=0 and for $q_{2}$ , x=+4.0 cm

When $x < 0$ positive charges> negative charge. due to this reason, they can not be cancelled.

At when $0 < x < 4$

localid="1648130310708" $V = 1 / (4 π ε_{0}) (\frac{q_{1}}{r_{0}} + \frac{q_{2}}{r_{4}}) q_{1} = 3 \times 10^{- 9} C q_{2} = 1 \times 10^{- 9} C r_{0} = x r_{4} = 4 - x V = 1 / (4 π ε_{0}) (\frac{3 \times 10^{- 9} C}{x} + \frac{1 \times 10^{- 9} C}{4 - x}) A t V = 0 x = 3.0 c m$

[Note: the value of electric potential for two charges is 0, V=0 V]

02

Definition of electric potential

At when x> 4

$\begin{array}{rcl} V & = & 1 / (4 π ε_{0}) (\frac{q_{1}}{r_{0}} + \frac{q_{2}}{r_{4}}) \\ q_{1} & = & 3 \times 10^{- 9} C \\ q_{2} & = & 1 \times 10^{- 9} C \\ r_{0} & = & x \\ r_{4} & = & x - 4 \\ V & = & 1 / (4 π ε_{0}) (\frac{3 \times 10^{- 9} C}{x} + \frac{1 \times 10^{- 9} C}{x - 4}) \\ A t V & = & 0 \\ x & = & 6.0 c m \end{array}$

[Note: the value of electric potential for two charges is 0, V=0 V]

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A group of science and engineering students embarks on a quest to make an electrostatic projectile launcher. For their first trial, a horizontal, frictionless surface is positioned next to the 12-cm-diameter sphere of a Van de Graaff generator, and a small, 5.0 g plastic cube is placed on the surface with its center 2.0 cm from the edge of the sphere. The cube is given a positive charge, and then the Van de Graaff generator is turned on, charging the sphere to a potential of 200,000 V in a negligible amount of time. How much charge does the plastic cube need to achieve a final speed of a mere 3.0 m/s? Does this seem like a practical projectile launcher?

Two positive point charges q are located on the y-axis at $y = \pm \frac{1}{2} s$ .

a.Find an expression for the potential along the x-axis.

b.Draw a graph of V versus x for $- \infty < x < \infty$ . For comparison, use a dotted line to show the potential of a point charge 2qlocated at the origin.

$F I G U R E Q 25.11$ 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 $V_{a}$ to $V_{c}$ .

What is the electric potential energy of the group of charges in

FIGURE EX25.7?

The arrangement of charges shown in FIGURE P25.68 is called a linear electric quadrupole. The positive charges are located at $y = \pm s$ . Notice that the net charge is zero. Find an expression for the electric potential on the y-axis at distances $y > > s$ . Give your answer in terms of the quadrupole moment, $Q = 2 q s^{2}$ .

See all solutions

Recommended explanations on Physics Textbooks

Magnetism and Electromagnetic Induction

Read Explanation

Physics of Motion

Read Explanation

Electricity and Magnetism

Read Explanation

Thermodynamics

Read Explanation

Electricity

Read Explanation

Oscillations

Read Explanation

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free