# Electrostatic Field/Magnetic Fields

1. Jul 29, 2012

### jcj330

There is an arbitrary vector A=A[R](R,θ,∅)R(phasor) + A[θ](R,θ,∅)θ(phasor) + A[∅](R,θ,∅)∅(phasor). What relationship exists between the three functions A[R], A[θ], and A[∅] if this vector is either:
A: Electrostatic Field
B: Magnetic field
I really have no idea where to start with this problem, nor do I have a great understanding of what this problem is asking. Any help or guidance in this problem would be appreciated. Thanks!

2. Jul 29, 2012

### yungman

This is vector in spherical coordinate that comprises of three orthogonal components where:

$$\vec A =\hat R A_R +\hat \theta A_{\theta}+\hat \phi A_{\phi}$$

Here is the explanation of Spherical coordinates:

http://mathworld.wolfram.com/SphericalCoordinates.html

Last edited: Jul 30, 2012