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## Homework Statement

What is the relationship between the magnitude of a radial electric field and and its associated potential? Choose the correct general relationship?

## Homework Equations

The following alternatives are given:

a) E(r)= dV(r)/dr

b) E(r)= V(r)/r

c) E(r)= -dV(r)/dr

d) E(r)= -V(r)/r

## The Attempt at a Solution

I know the electric field is proportional to the inverse of (r^2) and the potential is proportional to the inverse of (r). My problem lies in understanding the calculus of the above formulas. Can anyone guide me through them please?

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