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Three charges each equal to are placed at the corners of an equilateral triangle of side length . What is the electric field at the centroid of the triangle?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
The electric field vectors from the three charges at the centroid are equal in magnitude and separated by . Their vector sum is zero by symmetry.
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