{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture8

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

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

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

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

View Full Document
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
3 • Uniformly charged rod • Total charge q • Length L • What is V at position P shown?

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}