A point source current has an unknown current with a conductivity S. Q, representing the electrical potential, is .1 V at 5 cm away from the point source and is .005 V when 10 cm away. Find the current and the conductivity.
2. Relevant equations
I think these 2 are most relevant, say S is conductivity:
3. The attempt at a solution
OK, so what I tried to do was a system of equations since we have 2 unknowns using equation 2, but what keeps happening is that my variables cross out every time so its like Im solving for nothing. This makes me think I need to use equation 1, but Im not sure how I should apply it. I think I should subtract the potentials to get dv, but dont know where to go from there.
Also, sorry if this is in the wrong section. Wasnt sure where exactly I should put it.