/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q53P Question: A thin hollow spherica... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Question: A thin hollow spherical glass shell of radius carries a uniformly distributed positive charge +6×10-9C, as shown in Figure 15.65. To the right of it is a horizontal permanent dipole with charges +3×10-11and -3×10-11separated by a distance (the dipole is shown greatly enlarged for clarity). The dipole is fixed in position and is not free to rotate. The distance from the center of the glass shell to the center of the dipole is 0.6 m.

(a) Calculate the net electric field at the center of the glass shell. (b) If the sphere were a solid metal ball with a charge , what would be the net electric field at its center? (c) Draw the approximate charge distribution in and/or on the metal sphere.

Short Answer

Expert verified

Answer

(a) The net electric field at the center of the glass shell is, .

(b) The net electric field at its center is, .

(c) The charge distribution on the sphere has been provided.

Step by step solution

01

Identification of the given data

The given data is listed below as:

  • The radius of the thin hollow spherical shell of glass is,R=0.17m
  • The charge carried by the thin hollow spherical shell of glass is,Q=+6×10-9C
  • The charges of the dipoles are,q=±3×10-11C
  • The distance of separation of the dipole, s=2×10-5m
    • The distance between the dipole’s center and the glass shell’s center is, r = 0.6 m
02

Significance of the electric field 

The electric field of a dipole is directly proportional to the charge and the separation distance of the dipole and inversely proportional to the distance from the center of the dipole to the center of the sphere. Moreover, the electric field of a point charge is directly proportional to the charge of that object and inversely proportional to the distance of the charge from the center of the electric field.

03

(a) Determination of the net electric field at the center of the glass shell

The equation of the net electric field due to a dipole is expressed as:

E1=kqsr3

Here, is the electric field constant, is the charge of the dipole, is the distance of separation of the dipoles and is the distance between the dipole’s center and the glass shell’s center.

Substitute the values in the above equation.

E1=9×109N·m2/C23×10-11C2×10-5m0.6m3=9×109N·m2/C26×10-16C·m0.216m3=9×109N·m2/C22.7×10-15C/m2=2.5×10-5N/C

Thus, the net electric field at the center of the glass shell is, 2.5×10-5N/C.

04

(b) Determination of the net electric field at its center

The equation of the net electric field due to the sphere is expressed as:

E2=kQR2

Here, is the electric field constant, is the charge of the sphere and is the radius of the sphere.

Substitute the values in the above equation.

E2=9×109N·m2/C26×10-9C0.17m2=9×109N·m2/C26×10-9C0.0289m2=9×109N·m2/C22.076×10-7C/m2=1868.51N/C

Thus, the net electric field at its center is,1868.51N/C .

05

(c) Drawing the approximate charge distribution 

The approximate charge distribution has been drawn below:

Here, in this above figure, the charge distribution is at the surface of the sphere. The reason the positive charge is at the surface is that as the positive charge of the dipole is directed at the sphere having positive charges, then due to the repulsion, the positive charge will be outside of the sphere.

Thus, the charge distribution on the sphere has been provided.

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.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

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

Two rings of radius5Cm are24 apart and concentric with a common horizontal x axis. The ring on the left carries a uniformly distributed charge of+31nC , and the ring on the right carries a uniformly distributed charge of-31nC. (a) What are the magnitude and direction of the electric field on the x axis, halfway between the two rings? (b) If a charge of-9nC were placed midway between the rings, what would be the force exerted on this charge by the rings?

Consider a thin plastic rod bent into a semicircular arc of radius Rwith center at the origin (Figure 15.57). The rod carries a uniformly distributed negative charge -Q.

(a) Determine the electric field E→at the origin contributed by the rod. Include carefully labeled diagrams, and be sure to check your result. (b) An ion with charge -2eand mass is placed at rest at the origin. After a very short time ∆tthe ion has moved only a very short distance but has acquired some momentum .P→Calculate P→.

For a disk of radius R=20cm and Q=6×10-6C, calculate the electric field 2 mm from the center of the disk using all three equations:

role="math" localid="1656928965291" E=(Q/A)2ε0[1-z(R2+z)1/2]

E≈Q/A2e0[1-zR],andE≈Q/A2e0

How good are the approximate equations at this distance? For the same disk, calculate E at a distance of 5 cm (50 mm) using all three equations. How good are the approximate equations at this distance?

Question: A solid spherical plastic ball was rubbed with wool in such a way that it acquired a uniform negative charge all over the surface. Make a sketch showing the polarization of molecules inside the plastic ball, and explain briefly.

In Figure 15.61 are two uniformly charged disks of radius R that are very close to each other (gap≪R). The disk on the left has a charge of−Qleftand the disk on the right has a charge of +Qright(Qrightis greater thanQleft). A uniformly charged thin rod of length L lies at the edge of the disks, parallel to the axis of the disks and cantered on the gap. The rod has a charge of +Qrod.

(a) Calculate the magnitude and direction of the electric field at the point marked × at the center of the gap region, and explain briefly, including showing the electric field on a diagram. Your results must not contain any symbols other than the given quantities R,Qleft, Qright, L, andQrod(and fundamental constants), unless you define intermediate results in terms of the given quantities. (b) If an electron is placed at the center of the gap region, what are the magnitude and direction of the electric force that acts on the electron?

See all solutions

Recommended explanations on Physics Textbooks

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.