I'm doing the following problem, it seems to me that I am doing all the correct steps but my answer differs from the answer key, am I missing something?(adsbygoogle = window.adsbygoogle || []).push({});

1. What is the magnitude and the direction of the electric field at a point midway in between a -8.0uC and a +6.0uC change 4cm apart.

This is what I'm doing:

E = ( k * (Q1 / r1^2) ) * ( 1 + ( (Q2 / Q1) / (r2^2 / r1^2) ) )

==

(9x10^9 * ( (8 * 10^-6) / ( 2 * 10^-2) ) ) * ( 1 + ( (6 / 8) / (2 / 2) ) )

==

3600000 * 1.75 = 6300000 N/C

now..... that is what I'm getting, could somoen please point out to me what I am forgetting to do, if anything.

__________edit

stupidity strikes again..... forgot to square r1 :yuck:

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# Homework Help: Electric fields

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