{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter_22 - 22.1.WhatisPhysics 22.2.TheElectricField...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 22 Electric Field 22.1. What is Physics?       22.2. The Electric Field       22.3. Electric Field Lines       22.4. The Electric Field Due to a Point Charge       22.5. The Electric Field Due to an Electric Dipole      22.6. The Electric Field Due to a Line of Charge       22.7. The Electric Field Due to a Charged Disk       22.8. A Point Charge in an Electric Field       22.9. A Dipole in an Electric Field
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The Electric Field We bring in a positive charge  q 0  as a  test charge ,  which  is carefully selected with a  very small magnitude, so that  it does not alter the locations  of the other charges How does particle q “know” of the presence of other charge? 
Image of page 2
THE ELECTRIC FIELD The  e le c tric  fie ld  E  that e xis ts  at a po int is   the  e le c tro s tatic  fo rc e   F  e xpe rie nc e d by a  s m all te s t c harg e  q placed at that point divided  by the charge itself:  The electric field is a vector, and its direction is the  same as the direction of the force  F  o n  a po s itive   te s t c harg e   SI Unit of Electric Field:  ne wto n pe r  c o ulo m b (N/C )  
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Important about electric field   It is the surrounding charges that create an electric field at a given point. Any charge q placed at the point with the electric field E  will  experiences a force,  F=qE.  For a positive charge, the force points in the  same direction as the electric field; for a negative charge, the force points  in the opposite direction as the electric field . At a partic ular po int in s pac e , e ac h o f the  s urro unding   c harg e s  c o ntribute s  to  the  ne t e le c tric  fie ld that e xis ts   the re
Image of page 4
Example  1.  Electric Field Leads to a Force In Fig ure  a the charges on the two metal spheres and the ebonite rod  create an electric field  E  at the  s po t indic ate d. This  fie ld has  a  m ag nitude  o f 2.0 N/C  and is  dire c te d as  in the  drawing .  De te rm ine  the  fo rc e  o n a c harg e  plac e d at that s po t, if  the  c harg e  has  a value  o f (a) q 0 =+18 × 10 –8  C and (b) q 0 =– 24 × 10 –8  C.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Example 2. Electric Fields Add as Vectors Do Fig ure  s ho ws  two  c harg e d  o bje c ts , A and B. Each  contributes as follows to the net  electric field at point P:  E A =3.00  N/C  dire c te d to  the  rig ht,  and  E B =2.00 N/C  dire c te d  do wnward. Thus ,  E A  and  E B   are  pe rpe ndic ular. What is   the  ne t e le c tric  fie ld at P?
Image of page 6
Example 3. The Electric Field of a Point Charge The re  is  an is o late d po int c harg e  o f q=+15  μ in a vacuum. Using a test charge of q 0 =+0.80  μ C,  determine the electric field at point P, which is 0.20 m  away.
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern