- #1

Zack K

- 166

- 6

## Homework Statement

A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 2x10

^{-10}m along the x-axis.

Calculate the magnitude of the electric field due to the dipole at location ##\langle 0.2\times 10^{-8}, 0, 0\rangle##m

## Homework Equations

##|\vec E_{axis}|=\frac {2kqs} {r^3}## for ##r\gg s##

## The Attempt at a Solution

It seems simple and yet I have no idea what's wrong. I just plugged all the values in.

##|\vec E_{axis}|=\frac {2(9\times 10^9)(1.602\times 10^{-19})(2\times 10^{-10})} {(0.2\times 10^{-0.8})^3}=7.21\times 10^7N/C##. But the answer is ##3.6\times 10^4N/C##

I used this formula with the assumption that the r is much greater than s, which it is. But I even tried the formula where the difference between s and r is not a vast difference, yet I still got the wrong answer.

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