{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture8 - Physics 2102 Gabriela Gonzlez You bring a charge...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Physics 2102 Gabriela González You bring a charge of -3C from infinity to a point P on the perpendicular bisector of a dipole as shown. Is the work that you do: a)Positive? b)Negative? c)Zero? a -Q +Q -3C P
Background image of page 1

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

View Full Document Right Arrow Icon
2 What is the electric potential at the center of each circle? Potential is a SCALAR All charges are equidistant from each center, hence contribution from each charge has same magnitude: V +Q has positive contribution -Q has negative contribution A: -2V+3V = +V B: -5V+2V = -3V C: -2V+2V = 0 A C B -Q +Q Note that the electric field at the center is a vector, and is NOT zero for C! Divide the charge distribution into differential elements Write down an expression for potential from a typical element -- treat as point charge Integrate! Simple example: circular rod of radius R, total charge Q; find V at center. dq R
Background image of page 2
3 • Uniformly charged rod • Total charge q • Length L • What is V at position P shown?
Background image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}