chapter23bnotes - Zero Resultant Force Exercise Do it at...

Info icon This preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Zero Resultant Force, Exercise. Do it at home! square6 Where is the resultant force equal to zero? square6 The magnitudes of the individual forces will be equal square6 Directions will be opposite square6 Will result in a quadratic square6 Choose the root that gives the forces in opposite directions
Image of page 1

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

View Full Document Right Arrow Icon
Electric Field – Introduction square6 The electric force is a field force square6 Field forces can act through space square6 The effect is produced even with no physical contact between objects square6 Faraday developed the concept of a field in terms of electric fields
Image of page 2
Electric Field – Definition square6 An electric field is said to exist in the region of space around a charged object square6 This charged object is the source charge square6 When another charged object, the test charge , enters this electric field, an electric force acts on it
Image of page 3

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

View Full Document Right Arrow Icon
Electric Field – Definition, cont square6 The electric field is defined as the electric force on the test charge per unit charge square6 The electric field vector, E , at a point in space is defined as the electric force F acting on a positive test charge, q o placed at that point divided by the test charge: E = F e / q o
Image of page 4
Electric Field, Notes square6 E is the field produced by some charge or charge distribution, separate from the test charge square6 The existence of an electric field is a property of the source charge square6 The presence of the test charge is not necessary for the field to exist square6 The test charge serves as a detector of the field
Image of page 5

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

View Full Document Right Arrow Icon
Relationship Between F and E square6 F e = q E square6 This is valid for a point charge only square6 One of zero size square6 For larger objects, the field may vary over the size of the object square6 If q is positive, F and E are in the same direction square6 If q is negative, F and E are in opposite directions
Image of page 6
Electric Field Notes, Final square6 The direction of E is that of the force on a positive test charge square6 The SI units of E are N/C square6 We can also say that an electric field exists at a point if a test charge at that point experiences an electric force
Image of page 7

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

View Full Document Right Arrow Icon
Electric Field, Vector Form square6 Remember Coulomb’s law, between the source and test charges, can be expressed as square6 Then, the electric field will be 2 ˆ o e e qq k r = F r 2 ˆ e e o q k q r = = F E r
Image of page 8
More About Electric Field Direction square6 a) q is positive, F is directed away from q square6 b) The direction of E is also away from the positive source charge square6 c) q is negative, F is directed toward q square6 d) E is also toward the negative source charge
Image of page 9

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

View Full Document Right Arrow Icon
Image of page 10
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