Three point charges of equal magnitude q, that will yield a zero net electric field at the origin.
The coordinates of fourth point charge.
Answer to Problem 2.1P
The fourth point charge is at
Explanation of Solution
Given Information:
The magnitude of all four point charges is q. Three charges are at
Calculation:
The electric field at origin due to first point charge,
The electric field at origin due to second point charge,
The electric field at origin due to third point charge,
Let
From this calculation, the x coordinate and y coordinate are equal to positive sign. The distance of this point from origin is 1.68. So, the position of fourth point charge is,
Conclusion:
The fourth point charge is at
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