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Equipotential Surfaces and Electric Field

  • #1

Homework Statement



A given system has the equipotential surfaces shown in the figure .
http://session.masteringphysics.com/problemAsset/1122530/1/Walker.20.39.jpg

A)What is the magnitude of the electric field?
B)What is the direction of the electric field? (in degrees from the +x axis)
C)What is the shortest distance one can move to undergo a change in potential of 1.50 V?


Homework Equations


E=-V/R


The Attempt at a Solution


I found the answer to the Part A:
E= -V/R, R=4sin(26.565)
E=559 V/M

I cannot wrap my head around the answer to Part B, though. I thought it would simply be 180-25.65, but that's wrong. Any help?

I also know how to do Part C, so just Part B would be great!
 

Answers and Replies

  • #2
Answers that are also not correct are:
153
63.4
117.
 
  • #3
Nevermind, I was doing the angle perpendicular in the wrong direction. I got the answer.
 

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