- #1

abm77

- 13

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## Homework Statement

A positive charge Q is fixed to the origin. A negative charge with magnitude 9Q is fixed along the positive x-axis a distance

*d*to the right of the origin. Determine a point where a small positive test charge

*q*will experience zero electrical force from the two charges, or show that there is no such point. Draw diagrams to help you.

## Homework Equations

[/B]

F

_{E}= kq

_{1}q

_{2}/ r

^{2}

## The Attempt at a Solution

(+Q)--------d---------(-9Q)

I know the test charge must be to the left of the positive charge Q, and I tried to solve by rearranging the equation to solve to r, but that leaves you with dividing the force, which in this case is zero which does not work.

r = √kq

_{1}q

_{2}/ F

_{E}

But F

_{E}= 0 so this does not work.