How can I find the relationship between E and r in this scenario?

AI Thread Summary
The discussion focuses on finding the relationship between electric field strength (E) and radius (r) based on the given potential equation v = -224.1r + 22.17. The electric field is derived from the potential using the equation E(r) = -dV/dr, resulting in E = 224.1. The user expresses difficulty in establishing a direct equation relating E and r, noting that r disappears when differentiating the potential. Clarification is sought on whether the potential function was provided or derived from experimental data.
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Homework Statement



How does E depend on r?

Homework Equations



E(r) = -dV/dr

v = -224.1r + 22.17

The Attempt at a Solution



dv/ dr = -224.1
E= 224.1

I need an equation that relates E and r, but r drops out when I differentiate...
 
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Was this potential just given to you?
 
Potential? The equation with volts and radius (v = -224.1r + 22.17) is from my experiment, and the other (E = -dV/dr) is from my book.
 

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