L23_a - ELECTRIC POTENTIAL AT THE SURFACE OF AND INSIDE...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ELECTRIC POTENTIAL AT THE SURFACE OF AND INSIDE CHARGED CONDUCTORS (text section 20.6) For a charged conductor: Any excess (net) charge MUST be at the surface There can be no component of E r parallel to the surface o Means that E r just outside a conductor must be perpendicular to the surface 0 = E r inside the conductor What does this tell us about ELECTRIC POTENTIAL for conductors? E r surface means that the surface is an equipotential 0 = E r inside says potential V inside conductor must be same as potential V at surface o entire conductor is an equipotential
Background image of page 1

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

View Full DocumentRight Arrow Icon
What if there is an EMPTY CAVITY in the conductor? Entire conductor is an equipotential SO everywhere on the surface of the cavity is the same potential V If cavity is empty, any electric field lines would have to start and end at points on the cavity (call these A and B) o Only way to have 0 = = B A A B s d E V V r r for ALL possible paths between A and B is if 0 = E r inside the cavity
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/08/2012 for the course PHYSICS 1051 taught by Professor Michaelmorrow during the Winter '12 term at Memorial University.

Page1 / 3

L23_a - ELECTRIC POTENTIAL AT THE SURFACE OF AND INSIDE...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online