A given system has the equipotential surfaces shown in the figure .
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?
The Attempt at a Solution
I found the answer to the Part A:
E= -V/R, R=4sin(26.565)
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!