Lectures_Lect06

Lectures_Lect06 - Physics 212 Lecture 6 Slide Physics 212...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 212 Lecture 6, Slide Physics 212 Lecture 6, Slide 1 Physics 212 Physics 212 Lecture 6 Lecture 6 Electric Potential Electric Potential Physics 212 Lecture 6, Slide Physics 212 Lecture 6, Slide 2 BIG IDEA BIG IDEA • Last time we defined the electric potential energy of charge q in an electric field: 40 b b a b el a a U F dl qE dl ∆ = - = - r r r r • The only mention of the particle was through its charge q . • We can obtain a new quantity, the electric potential , which is a PROPERTY OF THE SPACE , as the potential energy per unit charge. b a b a b a U V E dl q ∆ ∆ = - r r • Note the similarity to the definition of another quantity which is also a PROPERTY OF THE SPACE , the electric field. q F E r ≡ V in Volts = Joules/Coulomb Physics 212 Lecture 6, Slide Physics 212 Lecture 6, Slide 3 Electric Potential from E field Electric Potential from E field • Consider the three points A, B, and C located in a region of constant electric field as shown. 40 • What is the sign of ∆ V AC = V C - V A ? (A) ∆ V AC < 0 (B) ∆ V AC = 0 (C) ∆ V AC > 0 • Remember the definition: ∫ ⋅- = ∆ → C A C A l d E V r r • Choose a path (any will do!) D ∆ x x ∫ ∫ ⋅- ⋅- = ∆ → C D D A C A l d E l d E V r r r r < ∆- = ⋅- = ∆ ∫ → x E l d E V C D C A r r Physics 212 Lecture 6, Slide Physics 212 Lecture 6, Slide 4 Checkpoint Checkpoint 2 2 08 A B C D • Remember the definition ∫ ⋅- = ∆ → B A B A l d E V r r = ∆ → B A V V is constant !!...
View Full Document

Page1 / 23

Lectures_Lect06 - Physics 212 Lecture 6 Slide Physics 212...

This preview shows document pages 1 - 5. Sign up to view the full document.

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