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Homework Statement
Two tiny objects with equal charges of 63.0 µC are placed at two corners of a square with sides of 0.260 m, as shown. How far above and to the left of the corner of the square labeled A would you place a third small object with the same charge so that the electric field is zero at A?
Homework Equations
E = KQ/r^2
The Attempt at a Solution
I first solved for E net on point A. My values were
Enetx = 2.962 x 10^6
Enety = 1.13 x 10^7
Magnitude of Etotal = 1.17 x 10^7
angle formed : 75.3 degrees
Now I tried two alternate solutions, but in the end I got the wrong answer still for both tries.
E = kq/r^2
r = sqrt(kq/E)
r = sqrt(k(63e-6)/1.17e6)
r=0.22m
dx=0.22cos75.3=0.0558
dy=0.22sin75.3=0.213
That one was wrong, so I tried finding the value of r using the components of the electric field
rx= sqrt(k(63e-6)/2.962e6)
ry=sqrt(k(63e-6)/1.13e7)
rx =0.43m
ry=0.22m
still wrong, i need help because I'm not sure what I'm doing wrong.