Two +3.0nC charges are shown in the diagram below which are spaced 10cm apart. What are the strength and direction of the electric field at the position indicated by the dot in the figure (Figure 1) ?
What is the electric field in N/C?
What is the direction of the electric field? (above the horizontal)
E = kq/r^2
The Attempt at a Solution
For the top charge:
E1 = (8.99*10^9)(3*10^-9C)/(.05m)^2 = 10788 N/C
E2 = (8.99*10^9)(3*10-9C)/(.1118m)^2 = 2157.7 N/C
Add them together and I got 1.3 * 10 ^4 N/C
My answer was wrong... was it because the two charge have the same signed charge so really the y-components cancel so the magnitude of the electric field is just 2*E1?
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