1 / 8

Electric Field Phenomena: Charges, Forces, and Field Lines

Explore the characteristics of electric fields, including forces on charges, field lines, and the effects of point charges and dipoles within the field. Learn about net fields, locations of zero net field, torque on dipoles, and potential energy calculations.

beaub
Download Presentation

Electric Field Phenomena: Charges, Forces, and Field Lines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHAPTER-22 Electric Field

  2. Ch 22-2 Electric Field • Field: Region of space characterized by a physical property • Scalar physical property- scalar field; vector physical property- vector field • The Electric Fieldcharacteristics: Exerts force on a positive test charge • Electric field is due to a charge and surrounds it • Direction of E( given by arrow head): away from a positive charge and towards a negative charge

  3. Ch 22-3 Electric Field Lines • Space around charge filled with lines of force or electric field lines • Direction of E-field lines or direction of the tangent to a curved field line gives the direction of E at that point. • Number of E-field lines per unit area , measured in a planeto the lines, is proportional to the magnitude of E. • Closer lines, larger E and farther the lines, the weaker is E field • Parallel E field lines means uniform E-field

  4. P qo r q Ch 22-4 Electric Field Due to a Point Charge • Electric Field due to a point charge • E=F/q0=kq2/r2 • E-field due to sum of Charges: Enet=Ei =E1+E2+E3+….

  5. Ch 22-4 Electric Field Due to a Point Charge • Field between three charges: • Zero Net Field location: • For opposite charges , it is on the sides of the charges and nearer to weaker charge • For similar charges , it is between the charges and nearer to weaker charge

  6. Ch 22-5 Electric Field Due to a Electric Dipole • Electric Field Due to a Electric Dipole • Ed=2kqd/z3= (1/20) p/z3 where p is electric dipole moment given by: p=qd direction of p is taken from negative end to positive end of dipole

  7. Ch 22-8 A Point Charge in an Electric Field • The electrostatic force F on a charge q in an external field E is in the direction of E for positive charge and in opposite direction for negative charge

  8. F+ F- x-axis Ch 22-9 A Dipole in an Electric Field • Net torque on the dipole = p xE =pEsin • Negative torque for clockwise rotation =- pEsin • Positive torque for counterclockwise rotation =pEsin • Potential Energy U of a Dipole (U90=0) • U=-W=-90d= 90pEsin  d • U=-p Ecos = -p.E • Umin=-pE (=0); Umax=+pE(=180); • W=-U=-(Uf-Ui)

More Related