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Help with getting an expression for Electric field from a variable Voltage 
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#1
Jul1507, 07:02 PM

P: 4

It gives V(x,y,x) = A(x^2,3y^2,z^2) and asks for E.
What I have done: E is equal to V/d , and I assume d = (x,y,x) Dividing them I get E= A(x,3y,z) What am I doing wrong? I also have another question: In every plane parallel to the xzplane the equipotential contours are circles. What is the radius of the equipotential contour corresponding to V=1280V and y=2m? (this is an extension of the previous question). I have a test tomorrow, and there are a few things I still don't know how to do. Any hints on how to do these would greatly help my studying. 


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