- #1
liamporter1702
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Homework Statement
How far away from a 360μC charged particle is the electric field strength 49mN/C?
Homework Equations
E=(8.99x10[itex]^{9}[/itex] x [itex]\frac{Q}{r^{2}}[/itex]
The Attempt at a Solution
I assumed it would be a simple case of rearranging the equation to give r=[itex]\sqrt{\frac{8.99x10^{9}xQ}{E}}[/itex] but after doing this and subbing in the values I got a value of 8127, which is clearly not correct. The answer that has been given is 186mm but I can't see the solution.