Electric fields caused by multiple charges

AI Thread Summary
To find the position on the x-axis where the electric field strength is zero, the electric field due to the charge must equal and oppose the uniform electric field of 300 N/C. The equation E = K*Q / r^2 is used to express the electric field from the charge. The goal is to determine a distance r from the charge where the fields cancel each other out. This involves solving for r such that the electric field from the charge is -300 N/C. The solution requires balancing the two fields to achieve a net electric field of zero.
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Homework Statement


A particle with charge +7.88 μC is placed at the fixed position x = 3.00 m in an electric field of uniform strength 300 N/C, directed in the positive x direction. Find the position on the x-axis where the electric field strength of the resulting configuration is zero.


Homework Equations


E= K*Q / r^2


The Attempt at a Solution


I set up the equation with E = 0 but I'm not sure how you can solve it now for R since e = 0
 
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Find a value for r such that E becomes equal and opposite to 300N/C ie a point where the 2 fields cancel to zero.
 

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